It could possibly that your hormones are out of balance due to not taking your birth control on a regular bases. Especially when you start your menstrual cycle from not taking them. If your really worried go to your OBGYN or Primary care Physician and ask for a pregnancy test they can do one at the office and they can order blood work. You can always get pregnant on the pill as well if you don't switch your pill ever after so many years of being on it.
like today i had to take to bc pills to make up from the missed one yesterday and this is the first tome ive done that like I've thrown up twice and i feel really nasua
Well it's possible to get pregnant because you're not taking your pills regularly, but you aren't pregnant because you've had your period since you had sex.