I also have noticed a pepper smell when using melafix on occasion. Do you have active carbon in your filter when treating with meds? If so you should remove it, it removes the meds from the water. Do you mean Jungle's parasite clear or a cloudy remover? IMO
the clearing products for aquariums work temporarily and do not resolve the cause of the cloudiness. The slight cloudiness may just be a bacterial bloom, turning off the lights a few more hours a day should help.
She may still be recovering, my concern is her poo being white and stringy. I would try some medicated food if she is interested in eating at all. What size are your fish? I tried your profile and themy info button for you, but got no specific info. Are they the only fish in your tank? Goldfish will get rather large and should have 10 gals per fish. Depending on size they may be creating ammonia spikes between water changes. Your parameters would be helpful in that regard.