Two months no period(im usually irregular) still coming up negitive

Alyssa
I feel so sad. I see so many people having babies and announcing they are pregnant. Two false positives and two years trying to get pregnant. I use to have regular periods until my mom forced me to get the depo shot (once) about 4 yes ago. I have been to the Dr and they checked hormones(fine) and ovaries(fine) just don't know what to do.