Sex on period

I am 18 and I have been on birth control since I was 15. I take it properly every single day (also I take Zoloft). Today is the very first day of my period, I’m basically just spotting right now. How safe is it to have sex with my boyfriend with a condom AND with me taking my birth control properly? I am just a super cautious person about these things so I fee like I mainly need reassurance that I’m not gunna get pregnant. He and I are safe every time we do it, and we’ve never actually done it when my period has started. Thank you in advance :)