Differin application question

I washed my face at approximately 4:00 something pm, dont remember exactly the time and now its almost 5:30pm where I live. Does differin have to be applied right before I go to bed or can it be applied any time of the night? Sorry if this seems like a silly question but I dont know the answer

whats your fave eyeliner?

Hi gals! Im very new to eyeliner and I need suggestions. So far Ive only tried MAC graphic black eyeliner and black track fluid line. Whats your fave eyeliner?

exercise

I want to exercise because I think it will help my skin. I am however scared to use the treadmill or the stair climber because they hurt my knees. I already have knee pain most days, Im not sure why but its been going on for years. Can anyone recommend exercises I can do that wont hurt my knees?

eye cream

What eye cream or eye serum do you use to combat under eye circles and age spots?

Endometriosis, sorry if this is in the wrong section

but how do you get tested for endometriosis? My periods are very long, heavy, painful and I wonder if I might just have this condition