I had sex day before ovulation, 7 days later my breast are tingly and my sinus are draining and cramp in my lower stomach could i be pregnant?

Its possible: Unprotected intercourse around ovulation is a good way to get pregnant. The symptoms you are having don't necessarily confirm you are pregnant, however. The best way to confirm you are pregnant is to do a home pregnancy test. You can get one at the pharmacy without a prescription. They are usually accurate anytime after you miss a period. Best wishes!