Can’t seem to get pregnant

Has anyone gone through this I stoped birth control in March and been trying to conceive but every time I think a month is going to be that month my period ALWAYS start this time it started a whole week early Af wasn’t suppose to be here until the 27th can anybody tell me what I’m doing wrong or what will help? Anything advice is welcome!

Edit

Is it possible that I can be having a chemical pregnancy? I’m experiencing all the symptoms I have never had my period start a whole week early like it’s just beyond strange to me .