Hello! Just stumbled on your log as I was looking through the new content and saw 'vegan'. I applaud your decision very much because you are not only improving your health, but you're also benefiting animals and the environment.
Please don't quit your vegan diet! Meat and dairy is just filled with hormones and crap that we really shouldn't have. Also, maybe you've found a correlation to dairy and your acne? I know that I did. Also, I mean, vegetables aren't going to hurt you. 
For the record my acne was a bit worse than yours as it extended past my cheeks and down around my chin a lot, I literally had a beard of acne, seriously depressing and hard to think how I got by. Obviously I credit Accutane for my progress, and I highly encourage you look into this medication for yourself as I think it'll give you the results you're looking for. I'm totally all for going about things 'the natural way', but in a situation like this I recommend going a little over the edge.
I actually went on accutane before. It kept my skin clear for about 6 months post accutane but since then it's been spiralling downwards. I also have permanant joint pain from the accutane in my wrists, elbows, knees and most severely my ankles. It's not constant but the ankles REALLLY hurt when I've been standing for only a few hours. My skin's much more on track now. I credit that partially to the diet, mainly to adding spirulina/chlorella to my diet. I've actually been a vegetarian for over a year now, not related to my skin, just for ethical reasons. I am nearly vegan, since finishing my diet I do eat organic honey now (I heard it's good for my skin).
Hey Jennifer, how are you and how is your skin doing? 
I'm good! And my skin is doing better than my last post. I've been taking 10+ grams spirulina each day and 6+ chlorella and I'm starting to really see an improvement. Since it was halloween yesterday I had a bit of a chocolate binge, eek. Although no new zits from that yet thank goodness. My acne scars are healing up faster than I expected (due to the chlorella I think), and I haven't been getting as many new spots. I'll post a picture shortly, right now I have a spirulina mask on! Haha, I'm addicted to this stuff.
Since I did not get the dramatic results I'd hoped for with my diet, I am going to try a slightly different approach. I am going to eat healthy, and low sodium, low sugar, and limit refined/processed foods. I'll treat myself once in a while, but basically I'm just going to eat healthy and not stress about it quite so much. I'm going to take my spirulina and chlorella religiously, as well as my protein powder, multivitamin and vitamin c. I'm still going to drink lots of green/white/oolong/roobios teas, as well as dandelion and chamomile. I'll try this for a while and keep posting with my results.
Yesterday for the first time I tried a
spirulina/chlorella mask. I read an article about this 15 year old boy with severe acne, who cleared it 4 weeks with spirulina tablets and spirulina masks every day. The article just said mix spirulina with moisturizer until it's dark green, and I tried it out. It was easy to prepare, easy to put on, smelled gross though. I used both spirulina AND chlorella in my mask. I kept it on for 20 minutes, and when I washed my face off I was shocked. My skin was glowing like I've never seen it before and it calmed ALL my acne spots down, as well as helped with scarring instantly. I really recommend trying this. I'm going to do these daily and post about the results. I have one on right now actually. I'll take a picture after I wash my face and upload them so everyone can see my progress.
To update, this is my new regimen. I'll post pictures at least once per week.
Eating healthy, limit refined foods. Generally low sodium and low sugar. When bad food is eaten take chlorella, dandelion tea, lots of water right after. 10+ grams spirulina daily, 6+ chlorella.
AM
wash face with korres white tea cleanser, tone with green teabags, moisturize with korres pomegranate balancing moisturizer, derma e very clear spot treatment
PM
wash face w/ water & pat dry, apply spirulina/chlorella mask, leave on for 20 minutes, wash face w/ korres white tea cleanser, tone w/ chamomile teabags
avoid makeup, contact with any and all oils, keep clean sheets/towels always.
I look like a swamp creature with this mask on. I smell like one too, yuck.
Fresh after PM regimen

The only active spots on this side are the teeny tiny little two right near my ear, rest are red marks, hooray!

Three active spots on this side, one medium sized one bottom right near the jawline, one little one above that, one under my lip and right a little bit. The rest there are red marks, getting there!
Also have some teeny tiny little whiteheads under my nose, not worried about them though you can't even notice them.