Help, I’m confused

I am 23 days late on my period and very confused.... I was taking test daily until about 2 weeks ago when I gave up because I kept getting negative tests. Then I started feeling sick this weekend and my boobs are TERRIBLY sore. They are sensitive to the touch, so I honestly started feeling like maybe I was pregnant. I ended up taking a test earlier and it was negative.. I don’t want to go to the doctor with all the craziness going on, but I need some advise. Has anyone else dealt with something like this? Im usually always regular with my period so this is weird to me.