So... what should I do?

Help!! 😭😩🤯Okay, so my boyfriend and I have had unprotected sex a lot this month and he’s pulled out (but I’m scared that he may have cummed in me) but today I had some light pink blood. Is that normal for “pre-period”? I’ve never had that before and it’s someone unusual for me. Could anyone give me some advice. My period is supposed to come the first week of May. Any advice or tips I should do? When should I take a pregnancy test, should I worry so much— so I don’t stress so much that it could cause the period to delay or anything. I’ve been stressing & worrying about this for a few days now. Just please help 😩😩😩