brown blood on pill

i started the pill in april ish, was doing 3 weeks on 1 week off, recently discussed wijt doctor and now have to take the pill for 3 months (ish) then 4 days off, i did that and for the past 2 weeks i’ve been having brown blood alot and cramps also feeling i’ll- could this be a sign of pregnancy? or should i not worry? going to do a test anyway but i’m not sure if this is just a normal thing anyway. thanks