Hi turshe,
since your body is relying on the pill to regulate your period, your period is most likely going to be very irregular for a little while now. You may need to take a pregnancy test just to make sure you are not actually pregnant, and continue taking your birth control pills. Keeping in mind you will need to be a little careful for the first couple of weeks taking them, as you won't be fully protected.
Many women are allergic to latex on condoms, so it is not unusual to find condoms uncomfortable.
As for the migraines, stomach pain and vomiting, that could be caused by many things, including the fact that you are worrying so much about your situation and I would imagine taking a whole month worth of bc pills would be enough to make you feel unwell.
Have you been to see your doc ? Maybe you could ask for some help in getting a pregnancy test, and also getting yourself back on track with your birth control.
Good luck.