Bfp after 12 dpo?

I had my first IUI on the 19th. I know they don’t typically take on the first try but I’ve had so many symptoms I was feeling positive. I took a test this morning at 12 dpo and it was negative…

Has anyone gotten a positive after 12 dpo?

My last pregnancy I found out at 10 dpo, unfortunately it ended in a miscarriage.