Hi first of all try to relax.your bleeding may be due to not taking the bc pills properly but you have to meet your doctor to rule out any pregnancy
and related issues.
Record your temperature and check if you are having any fever
Feeling sick means you are having gastritis
related either to pregnancy or some other non pregnancy cause check as to what is precipitating it .
I would suggest please meet a doctor at the earliest and get things sorted instead of getting worried and tense.