 [ Symptoms ] why do i have painful stinging while urinating after intercoarse can contraceptive films play a part in that  my girlfriend uses contraceptive spermicidal films could that be the cause of occasional painful stinging while urinating after intercourse it does not happen often but when it does i tend to pee more frequently but not much comes out [ Disease ] it depends some people gain a little weight while on birth control pills but not everyone does you may notice a bit less water retention which would go away rather quickly    most likely in the first week or two after you stop taking the pill but you are not likely to notice a significant drop in your weight simply by stopping the birth control pill