Need some venting

Shevon • 25 year old LPN in the state of Florida. Engaged 08/06/2015. TTC #4. Irregular menstruals, tested negative for PCOS
My menstrual has been all over the place since Jan... tested for pcos and that was a no go. Im pretty sure I miscarried in july had a menstrual in august and September, however this month NO AF tested two says ago and BFN... me and fiance want a child but ugh its becoming stressful and saddens me I cant give him a child.