Breakthrough Bleeding because of Stress?

Hi, I have a gyno appointment in a week but i cannot wait that long, and plus, i had with my boyfriend today which probably wasnt the smartest move. The thing is, I was scheduled to have a tonsilectomy for July 10th. I am on the pill and had my period a couple of weeks before the surgery. About another week later, the week of the actual surgery, i got breakthrough bleeding that lasted as long as a period would and it started off with blood. It felt like i got my period again, even though i had just got it a week before. I was really worried because i NEVER experience breakthru bleeding and I have been on the pill for almost 2 years, so its not because my body isnt used to it.... My boyfriend said i was super stressed out that week. I have started a new pack of pills and i am 8 active pills in, with no breakthrough bleeding, but i am afraid to have in fear that the pill isnt strong enough or something. My boyfriend and i are anxious and i can hardly wait another week to ask my gyno this question. My question is, is it possible my breakthrough bleeding was because of the stress, even though I have been stressed before and it's never happened..? And if I have this month should I be worried about the pill not doing its job? All input helps. thanks.