I need help!

Okay, so my boyfriend and I were having sex on Saturday and he fished and I finished and then he pulled out and there was blood on him. It wasn't bright red and it wasn't a lot. Well he both thought I had just started my period. Okay no big deal well I put a tampon in and I went to change it a couple hours later and it's not full at all. It had some brown blood on it. And that's the last that I seen of my "period". We aren't ttc or anything he never pulls out which isn't a big deal but I'm scared to take a pregnancy test. I've had all the cramps for my period and no flipping period!!!