I have a discharge after having intercourse, and not prior. could this be caused by the condoms that are being used?

Unlikely: Have u been checked for vaginitis.

Maybe: A person can always have a localized allergic response to latex, lubricants, spermicides or other features of such a product. Finding a different type (non-latex) or additive free may be helpful. However, the vaginal environment supports the growth of a number of germs & this is a more common cause of discharge.