I stopped taking the bc pills four days ago now I have cramping in stomach and back feeling sick am I pregnant took bc pills for 5 days. After sex?

Not sure. You took birth control pills for 5 days? That doesn't really suffice in terms of protection for pregnancy or control of your menstrual cycle. If you're asking, "Could I be pregnant" the answer is, possibly. Depends on where you're at in your cycle, when you had unprotected intercourse? If you don't want to be pregnant, use at least 1 if not 2 forms of birth control, like pills AND condom.