Help! Nervous! Period after sex?

Abby

So, I had protected sex 3 days ago and he was wearing a condom but still pulled out and we filled the condom with water to make sure there were no holes after. (I’m not on the pill) And after I felt fine but I’ve had an immense load of stress the next couple days from other things. My period was coming up, but it came a little early. Is that normal to get your period early after sex or could I be pregnant :/ my cramps are usually bad and right now they are awful