Could I be pregnant?

So I had unprotected sex with my parter (yes I know silly me) 2 days before my fertile window started. I'm now 3 days out of my fertile window and I've noticed the following:
- my boobs are bigger
- I'm peeing ALL THE TIME
- I've put on 2 kg with no diet or exercise changes
My period isn't set to start for another 11 days. 
Please help my very anxious mind! 
What do yo