My boyfriend had ejaculated in me 2 days before my period is it possible for me to be pregnant?

Unlikely but,: It is possible.Basically if you are ovulating and sperm has any possibility of entering your vagina you could be pregnant. Sperm can live up to 5 days in the female genital tract. If you miss your period then test. Testing either with a home urine test or a test in the doctors office either urine or serum is the only way to know.

VERY unlikely ..: ... but theoretically possible, in the sense that, for contraceptive purposes, you should consider you could get pregnant ANY time, even during your period. But it is HIGHLY UNLIKELY that you would have ovulated, conceived, and then had a normal period two days later. I wouldn't worry about being pregnant. But pursue reliable contraception if avoiding pregnancy is your goal. Good wishes:)