Bfp at 3 weeks of 7?

Taylor
I got a bfp today with mid day urine and my boobs hurt like hell. I've been tired all week and have been feeling nauseous all week and I knew exactly what i wanted to eat for every meal. I had a very short/light period at the beginning of the month, so I don't know whether I'm 7 weeks pregnant or 3 weeks. What do y'all think?