No period?

Celeste

I’m on cycle day 30. I’ve taken 2 tests that had some gnarly indents. (Same brand, Walgreens) and a frer that was negative. spotted bright pink this morning (barely anything) and still no period? My husband and I are using the pullout method this month because I have to get surgery to remove my gallbladder on Thursday. Any guesses on what’s up? My cycles are usually regular. So I don’t get it.