ovarian cyst or pregnancy or something else?

this months past period was about 5 days early and light. I was thinking it was spotting and i could be pregnant, but i took 3 tests in the past month and they all came out negative. i also dont have tender boobs or morning sickness, some of the first signs of pregnancy. but for the past, a little over a week, about a week and a half after my periond started, i have had quite a bit of severe cramping and bloating, and sometimes sharp pain in my abdomin. i also feel a lot of pressure on my abdomin and my breasts seam to be swollen. i also feel as if i have gained some weight and havent been eating anything out of my normal eating habbits. could the pain i am experiancing be ovarrian cysts or possibily, i really am pregnent. i dont know much about ovarian cysts and it seams every symptom for pregnancy could also be somehting else. my mother is going to make me a gyno appointment but its taking her a while and i dont want things to get worse with out me knowing what is wrong.