🤔 late period.

I'm three days late. I know that's like nothing but I had sex with my partner a few weeks ago (2 I think) and the second round was without a condom I told him not to cum inside and he said of course not. But when he came I didn't feel his semen like on my but or anything and I forgot to ask him. I've been having somewhat painful cramps these past three days. Should I be worried? Should I get a pregnancy test