Go see your doctor about the stuff you are 'drinking,' and remember that Prozac can indeed erase your libido. Bring everything you are taking to the doctor and let him or her see what it is and what dose you are taking. Your meds and supplements might be interfering with your functioning in life.
It is usually harmless to have discharge from your nipples, especially if you've had kids. Is it a lot of discharge? Does it come out on it's own or when you squeeze them? If you're unsure, or if it looks bloodstained at all, then yes, see a doctor.
Also do you suffer from depression?