Surgery and CD 40

Me

My cycles are typically 26-35 days. A couple of times they have gone longer. Only once have they been super late, CD43 but I had spotting like four days before. I always have spotting when I am late. I have not had any spotting.

I have surgery scheduled for Thursday. (CD44) they are going in my uterus to remove a polyp and take a look at everything.

I have take a couple pregnancy tests and all are negative but just the thought of *maybe* is making me uncomfortable with doing surgery.

If af comes after today I have to cancel surgery anyway since she can’t do it while I’m on my period.

My question is, if af doesn’t come would you request a blood test before surgery or just take a FRER the morning of to be sure?

Thanks for your input!