Hello! I'm on the same regimen as you are, it seems. An intitial breakout period is, unfortunately, an aspect of starting tretinoin that most people experience. However, clindamycin is a topical antibiotic and is supposed to reduce the intitial breakout period so it will not be as bad as it would be. I'm on my fourth week of this combination and I'm still breaking out- with whiteheads more than anything else. However, my intitial breakout is worse than my typical acne. In general I would say to stick it out, as what you're describing is pretty common. It has to get worse before it gets better. I know it can be very hard emotionally to deal with the IB, so if you need anyone to talk to feel free to message me. My doctor told me that it will take two to three months to see consistent results. Here's hoping my fourth week is better than the previous three!