I had unprotected sex on my ovulation day, 3 days later i started what i think was an early period, it's been 8 days and i'm still slightly bleeding?

Check preg test: Please check urine pregnancy test if you haven't. It should be accurate 10 to 12 days after your last episode of unprotected sex. Some women spot when pregnant and this can be normal. It can also be a sign of extopic pregnancy or other worrisome outcomes. If you have any tenderness with your spotting in your pregnancy test is positive, please go see a provider to rule out ectopic pregnancy.

See answer : Recommend either a urine or blood pregnancy test. Most home pregnancy urine tests (HPTs) will give accurate results if you test at the time your period would normally be due, which is about two weeks after you ovulate. If you choose a more sensitive HPT that is calibrated to detect 10-20 mIU/ml, then 7-10 days after ovulation. Blood tests can detect pregnancy from about 6-8 days after ovulation.