I don't know what to do!

I had an early miscarriage or chemical pregnancy last year in late October/early November..by thanksgiving my tests were completely negative. I didn't even know I was pregnant because we had just started ttc in September. I have tried progesterone supplements to see if maybe I'm not getting pregnant because my progesterone is too low or if maybe that's why I had the miscarriage. I have taken so many vitamin that say they help with ovulation and fertility and all that. I have two kids and have never had a miscarriage before this one. It is now September and is going on a year since that miscarriage happened. I have not been able to get pregnant since then and I just don't know why! I am so tired of trying..I feel like it's never going to happen again. I feel like something is wrong with me or my husband. I just don't know what to do. I just want to be pregnant right now so badly. 😢