When didnyou get BFP?

I took a test 2 days late and it was BFN. I’m now 5 days late I called my doctor and she said sometimes the HCG in your urine isn’t high enough to test. I do plan on this week going in for blood work. But I want to take a digital to surprise my husband (if I am pregnant) I’m just hoping for the best. 8 months trying. What was the latest after missed period did anyone get BFP? I need hope