I took Plan B march 30 got period feb10. Sex, feb 23. Now I have missed period for 3 days. Hpt all negative. Tested 17days after intercourse. Pregnant?

Probably not. Question is confusing since march 30 hasn't arrived yet. Plan b can cause period to be late, so that's probably what happened. With a negative hpt 17 days after intercourse, pregnancy quite unlikely.