help!

Brittani
Alright, so back in may my doctor took me off my bc because of my blood pressure being way to high. (150/90) since I have been off of bc my husband and I have been using condoms religiously. I have only had two periods since May and I am currently 32 days late. I have taken 4 pregnancy tests, as recent as 3 days ago and still all tests show up negative. I am worried that I could be pregnant but also wondering if this is normal to be so irregular after being on bc pills