Last period ended ~2 weeks ago (6 days long). Had sex 10days ago w/a condom, but im not on the pill. Could a quantitative hCG blood test from today be accurate? Could I be pregnant? I feel mild cramps

Family practice . Too soon for HCG testing. Wait at least 2more weeks. By then you may have another period.
Seems unlikely. Condoms are pretty effective at preventing pregnancy. May be a bit early for a beta. A positive beta would be real but a negative would require a retest. I would wait until next week i think...