Hi.. I am currently taking Prozac (20mg) per day for perimenopausal mood swings and depression. I have had some of the same symptons. Stay pretty tired, no sex drive. However, it has helped with IBS. I still have problems just about every day because I have yet to find a diet that works. But, thanks to this web site, I may have. Give the medication a little more time and see what happens. Good luck.