I need advice

So i’ve been having unprotected sex with my boyfriend for about a week now like everyday or mostly everyday and skip a few.

Here’s the thing,

Before i spent a few nights with him, i was in Florida on my period. The day before I left he said he wasn’t too sure if he pulled out in time. I wasn’t worried because i didn’t feel anything. I’ve been taking my birth control (other than missing like one day while i was sick) I’ve been bleeding a little though. I’m not too sure if it’s my period coming back from being in the water (since i’ve heard water can stop your period/ not 100% sure) or just from where he tore some tissue.