Negative after negative

I have been trying to get pregnant for almost three months now. I am currently eighteen, about to be nineteen. Since I was eleven I have been dealing with ovarian cyst. I was never told I was infertile or anything. My periods have been about five days late for the last two cycles, so apart of me gets excited but then I pop negative. Does anybody have any tips..? It’s really heartbreaking receiving negative after negative.