So young.. so infertile

I'm currently 19 and have been ttc for a year now .. hsg test came back normal, my spouse and I have timed my fertile days, used opk's, and everything.. the works. It didn't work even the months we agreed not to try but "try" .. I guess I feel so bad bc I know the problem is with me as he had two other kids.. as bad as I feel I'm not going to give up, I now realize that I need additional help so I plan to take folic acid, use coconut oil in my belly button (heard it's a thing), eat healthier and also use geritol! I just need to vent a little, I feel so worthless