Help please

I’m two days late I had sex on March 15 which is when I was most fertile but I had protected sex with a condom. I think it’s been two weeks since then I’m supposed to get my period but I haven’t. I’ve been stressed about it because on March 24 I had sex again with a condom but when my boyfriend was fingering me blood came out a little bit. I’ve been feeling nauseous and I experience slight cramping. I stopped bleeding after he fingered me so he may have just scratched the inside. I’m just worried I might be pregnant but the condoms never broke or had tears were always safe. My period always seems to come late when I’m having sex. I think I’m just stressed but I’m worried.