I don’t know if I’m pregnant or not...

About 2 weeks ago, my boyfriend and I had (protected) sex. But he had to finish himself off so after he was done we went to rinse off and stuff but he touched me down there with the hand that he finished with which I’m pretty sure had semen on it so what if it got into my vagina. I’m also due for my period in a couple of days. So I’m not sure if this could just be pms symptoms. But my boobs have been sore and I have been constipated and I know those are some early pregnancy symptoms too. If anyone could help me or offer some advice, I would appreciate it!