Feeling defeated...vent

I know many women have been trying so much longer than me so I don't mean to be insensitive. I'm just feeling so heartbroken and frustrated. My husband and I started ttc in March/April found out we were pregnant in May and then miscarried at 6 weeks in June. Then I see everyone say how you are more fertile the first couple months after a miscarriage and I guess that got my hopes up thinking we would pregnant again in no time. Well af is due in 3 days and while I know you're not out until af is here I really don't think I'm going to get my bfp. I hate seeing everyone say how you are more fertile if that was true why I am not pregnant. I just want to know what I am doing wrong. I just feel so heartbroken I want to be pregnant again.