Birth control and risk of pregnancy??

I’m on Isibloom, i started it directly after my last period (which ended 1/17) and even waited a week to have sex just to be safe. I take it religiously at the same time every day and I’ve never missed a day.

All of my prescription paperwork pretty much says risk of pregnancy is super low like 9/100 women.

However I just missed my entire period. I have been a little irregular the past few months but I’ve never missed an entire period. I’m also experiencing all of my normal period symptoms.

I’m not sure how worried I should be or how long I should wait to take a test. Has anyone had any issues with Isibloom? Like throwing off or preventing periods?? Or it just not working in general?