Any suggestions

Amber
I'm 26 yrs old n have been TTC since May 2014. I had what I think was a chemical pregnancy in late May 2015. Af is due 8/31 and still bfn. I just got married 08/01 and have been wanting a baby pretty bad before my husband turns 30. I've been tracking my ovulation using the clear blue digital but I feel like there is something wrong n I can't get pregnant. Ever since my mc. I haven't been able to predict af. I used to know like a week ahead bc my boobs would swell like a cup size then they would stop hurting as soon as I would start af. Not sure what's going on but any suggestions on what I could do or use to help my chances.