Swollen breasts..on and off!?

Hi everyone,

Ok, my boobs have felt quite swollen about 2 weeks prior to my period and all the way through my period even. I got my period right on time according to this app, it lasted 4 days. I thought the boob swelling feeling was going away yesterday( it's been 2 days since my period ended) but it's back again and I feel like my boobs look bigger but I don't know if it's just in my head!? I also have a slight tingling sensation in my uterus (lower abdomen).

I took a dollar store pregnancy test yesterday just in case but it came out negative. My partner also has a vasectomy! I just feel like I'm going alittle koo-koo. I rarely ever have breast swelling & heavy feeling in my breats..does anyone know why this could be happening or if it has happened to them?

I don't know if it's just wishful thinking and I am one of the rare cases and may be pregnant.