Had unprotected sex while on period. i normally have discharge right after, but it's been days and nothing. should i be worried?

Depends: Pregnancy is known to occur from sex on any and all days of the cycle. If you miss your period by 4-5 days, do a home pregnancy test. If the result is negative repeat the test 4-5 days later unless you get a period by then. Use first morning urine and follow the instructions for the test carefully. If you do not wish to be pregnant, use contraception all the time, every time. You may consider implanted contraceptive, or IUD. Practice safe sex. Get HPV vaccine.