Get back in touch with your physician, the CIPRO may not be working and you may need a stronger antibiotic or another attempt to drain with more numbing medication. If you choose not to talk with your doctor right away you should keep an eye out for a fever or any heat/redness of the area.
Could it be related to your birth control method? Contact your physician.
If you were pregnant you would not be having symptoms this soon after having sex. It's smart not to have unprotected sex and if you do to be prepared for the consequences. However, only four days after intercourse you would not be experiencing any symptoms related to a pregnancy - the symptoms you're having, aside from the cramps, could be anxiety...