I started my birth control pill at the beginning of January. It's a 3 week pill with both hormones and no sugar pills. Halfway through the pack, I got really sick and was put on amoxicillin. Well, like an idiot, I started feeling better and stopped the antibiotic 5 days before I was supposed to. That Friday I got my period but it was way lighter than normal. On Saturday I used condoms and still had a light period, and on Sunday started without a condom, but not the whole time and then had my period really light again. 

Then I didn't have my period the rest of the week. Well I ended up getting sick again and finished my antibiotics and started my pill for the next pack. But now I'm just becoming paranoid because I've had random cramps and have been a little gassy and my breasts have been a little tender. 

Is this a scare? Or is it possible that because I was on antibiotics and the pill, I was ovulating this past week and that is why I'm having these symptoms?

Thank you!