Pregnant or not ?? The suspense is killing me!

So I had sex on the first day of my fertile window about 11 days ago and thought from a few days afterwards that I felt funny. When I told my SO that I felt like I might be pregnant he told me when he was 17 (he’s now 19) the doctor said he was infertile. My breasts have been swelling a lot (and they’re sore, which has never happened to me before even in my early teens), I’ve been extremely exhausted, ivebeen cramping and I have been nauseous and dizzy. I don’t know if I’m pregnant or just delusional haha. What do you think ?