Hi Welcome to HEALTHCARE MAGIC.. I have gone through your query and can understand your concern... Yes there are slight chances of pregnancy even without ejaculation if you have unprotected sex. This is due to the fact that the pre-ejaculation fluid can contain some viable sperms, which could cause pregnancy. There may be some sperms on tip of penis from previous ejaculation too & these may also cause pregnancy. However you took the emergency contraceptive pill after that, therefore pregnancy possibility should be negligible. Most probably your periods are delayed. It is common problem after intake of emergency contraceptive pill due to high quantity of levonorgestrel hormone in it. You should also undergo a pregnancy test to rule-out pregnancy possibility, however chances of that should be very less. Refer to a gynaecologist for more queries Don t worry you would be fine Hope this information helps