Possible?

Hi ladies. I’ll make a long story short because I know it’s near impossible to conceive right before a period unless ovulation is funky.

I’m almost 9 months PP, period cycles have been 29 days consistently since about 5 weeks PP. April 21st my husband came inside of me, got my period 2 days later, pretty light from what I’m used to but definitely still blood and not just spotting so I figured I’m good. Now my May period hasn’t come. I’m 2 weeks late but got a BFN. Again, I seriously doubt I’m pregnant but, is it even worth testing again? If Im too far along would it cause a false negative by the hormone being too high? Should I just wait for AF? I was going to give it another week or two before I call my doctor because I know how slim odds are that I would have conceived right before my period. 🤷🏻‍♀️