I had sex noveember 6 had my november cycle but my december cycle have not came. im two weeks late. i been cramping for three weeks but no cycke,i take birth control, could i be pregnant?

Missed period on ocp: If you've missed pills or taken them late, of course you may be prenant. Do the pregnancy test; it is the only way to tell

Not impossible: Pregnancy is not impossible on birth control, but if used properly, most methods make pregnancy very unlikely. Some types of birth control cause menstrual irregularity especially early-on. Specifically the "mini-pill," (progesterone only) and the depo provera (medroxyprogesterone) shots will often make cycles less frequent. You may try asking again and specifying what type of birth control you take in the question.