possible pregnancy scare?

Recently my boyfriend and I started having sex... he talked me into having unprotected sex and I told him yes if he promised to pull out, he claims he pulled out, and I do rememeber him cumming and wiping it on the towel, however afterwards he looked so scared, and even told me he was afraid... We did it a few days after my period ended, and so now i'm just waiting for it to start back up in a few days... I was just wondering if you could feel it if he were to cum? and could I take a pregnancy test now? I don't use birthcontrol, and i'm only 17 and i'm stressing out... I have such high hopes and dreams for myself and the last thing I need is a kid.