Treated a small cyst or abscess in my butt by myself. It popped twice, got even smaller, and pain is almost gone, no redness. Should I still see a doc?

No. If your symptoms are improving it is not necessary to see a doctor. You should bring this up the next time you see your doctor however as they can counsel you on appropriate care should the problem arise again.
Abscess . You should not pop it, sometimes you can introduce pus deeper into the tissue, when you apply pressure. Next time try to use gentle warm compresses and avoid pressure, keep area clean and dry. Gentle cleaning with alcohol pads may also help.