I had unprotected sex 2 days after my period he cummed inside me. they say that its safe but it still worries me. is there any chance that i could get pregnant? and also my period is regular.

Morning after pill: The morning after pill, if taken within 72 hours after an unprotected intercourse, is 89 % effective in preventing pregnancy. It depends on how long the period lasted to gauge the chance of pregnancy. For example, 5 + 2 = 7 + 5 days for sperm potentially to survive = 12 days, which can get a woman close to ovulation. Menses of 7 days + 2 = 9 + 5 = 14 is right on the mark.