I haven't had my period in almost 6 months. Me and my boyfriend have regular sex but we ALWAYS use a condom, from start to finish. We have taken a few pregnancy tests and they all come back negative. We are kinda worried that I may be pregnant or may get pregnant and not know it. I don't have medical insurance because I am 20 and can't afford it right now (I just quit my HORRIBLE job). I use to be on birth control but I quit that in January after we heard all those horror stories about what happens to babies way after their mothers are off birth control and conceive. We want to have kids some day, we are just ready for it quite yet. So basically, we want to know if anyone knows the cause of this or not, and what to do.

Thank you in advance!