Is it just me?

Straight to the point. my boyrfriend and i of 1 year now are very sexually active, but he always pulls out before he cums, but there has been 2 times he has cum in me. once about a month ago, then just recently on the 3rd day of my period he did again, but it stopped immediately after and I've been super nauseous and multiple people have asked me if i am. I have almost every symptom of pregnany minus the sore or tender breast. And ive taken a test, but it was negative. i don't know if it was just too soon taking it or what. Ive asked friends of mine that have had kids and they say i have the same symptoms they had. They advised i take another test in a week. any advice or thoughts