I was late Last Month by 11 days and got AF ☹️ Went to OBGYN to check and she estimated me to have AF 7/9 by the Latest and Now Im late again 😩 what is going on? I already tested 2 days ago

and got a BFN. Up until last month I've Always been a day off from af. No signs of AF coming so far. Just headaches for the past two days and a lot of cm. Could I possibly maybe be pregnant and it's not catching it on the tests yet?

Here's my chart Ladies (Deleted other post because I accidentally wrote *bfp 🤦🏽‍♀️)