I'm out again. ?

Hilary
Just started my period again. 3 days early and didn't even have cramps or a warning :(. So incredibly bummed. Tried preseed this month, BD every day of my fertile week. Very positive OPKs. I just have this terrible feeling something is wrong with me. It's only been 4 real months TTC but still I just have this weird feeling I won't be able to have a baby. Is that even normal to worry this early on? I don't mean to offend ANYONE who has been trying for a long time, I just want to know if it's normal to be worried so early on.