Random Cycles

So I have a random question for y’all. I’ve been on birth control since I was 16. I’ve gone off of it and on it a bunch of times. This last month though has been weird. I was on antibiotics in December..it totally threw my cycle off and I got my period in the middle of December instead of the end. Then I got it again at the beginning of January and restarted my birth control after that, but then got it again this week...only 2 weeks apart. It’s light and I’ve been taking my birth control regularly. Is this something y’all have experienced before? I have a call into my gyno but I cant get in until the end of February