Could I Be Pregnant When My Period Is More Than A Week Late Apart From Light Brown Spotting Over The Past 2 Days?

My period is currently 9 days late. I've taken 3 pregnancy tests and all looked negative. I usually have cycles that are 26 or 27 days, im on day 36 now. I had not been taking my birth control pills perfectly in September.

and we didnt think to use protection. Its just weird to have this long of a cycle, but all my tests are negative. also the past 2 days I've had a light brown discharge, it's not much. and only when i wipe