Had unprotected sex on ovulation day cycle was 2 days early, it's 3 days after cycle and I'm having abnormal cramps, Could I be pregnant?

Could be. Check a home test today to find out, good wishes.
Maybe. Maybe not. It can be hard to tell if a woman is pregnant because some of the symptoms seen in early pregnancy can also happen in non-pregnant women. A urine pregnancy test gives a reliable result if done correctly. One can test about 3 weeks after sex (3 weeks after when conception might have occurred), or 1 week after missing a period. An Ob-Gyn doctor can evaluate any persistent or worrisome symptoms.
Possible..... . There is a good possibility......if you had sex with a potent male , who ejaculated in your vagina. If you had orgasm...chances are more. Cramps also can be because of bladder infection, STD, constipation etc.