Ovulation

So I stared my period on Dec. 30th, and I had unprotected sex on New Years eve with my boyfriend (mind you, I never use condoms because I'm allergic to them), and I just finished my period on the 2nd of January, would there be a slight chance that I'll get pregnant? Yes I'm on the pill, and I never missed a day. Should I take a pregnancy test anyways just to make sure, or should I not bother since it's too early and that I take the pill anyways?