Ughh. Any advice?

Today I'm 10dpo. Supposed to get af on the 7th. I have had some cramping since about 5dpo accompanied by very sore breasts, heightened smell, and extreme fatigue. I never cramp more than a few days before af, so to have been having cramps along with everything else made me hopeful.

I got antsy tonight and tested with an frer. It was a BFN. Although, I know it could be a bit too early, plus with testing at night could both be contributing factors.

When I got pg with my son almost 3 years ago, I didn't watch for symptoms or really even care one way or another and got my BFP 9 days after af was due.

And as I lay here typing this, I am experiencing some af type cramping and twinging.

My calendar shows when we bd, also.

Has anyone had a BFN around 10dpo to turn around and get a BFP shortly after?