Help!- flow is 5 days late and tests are negative

Ji

So back in February I went to see my GYNO because I have been having spotting every month around ovulation time, they did an ultrasound and diagnosed me with an endometrial polyp back in February this year. They think it could’ve caused my miscarriage back in 2018.

Anyways, I am having it removed this Thursday but my period is five days late now and my periods have been super REGULAR like so regular that my apps were always right about when I was going to start! But now out of nowhere my period isn’t here!

I took a pregnancy test the second day I was late and then the third..they came back negative. They were the ones from the dollar store and I took them during the day, so could that have something to do with it? Should take them in the AM instead and get an early detect test?

I’ve also been cramping like I’m going to start my period for days now and today I’ve had brown/light pink spotting. I don’t know guys what do you think 🤔 I’m super confused with my body right now! 😭