What is happening

I’ve been of birth control for about 6 months(depo shot )now I still haven’t had a regualr period I would only bleed once I just recently bled once on the 18 then it stopped I’ve been trying to get pregnant for the longest an I’ve been trying for a 1 1/2 now an still I get a negative could somebody help me please (I can’t afford to go to the doctor right about now cause I would have to pay) *if there are any clinics you lady’s know of for free an no cost that I can get checked out at please list them below thank it’s greatly appreciated *😘