Had sex on 4/2 and took plan b on 4/5. took first response pregnancy test on 4/15 & 4/20. both negative. have an irregular period. am i in the clear?

LIkely: It seems likely. Taking plan b, as you know, 72 hours after unprotected intercourse, isn't the ideal, but better than not. It sounds as if by now if you were pregnant, a pregnancy test would be positive. I would, in the meantime, find a more reliable form of birth control and wait another cycle so you can know where you're at in terms of ovulation and menstruation, if at all possible.