I took 40 mg aday for 11 days, then 20 mg for 2 days, then 10 for...

I took 40 mg aday for 11 days, then 20 mg for 2 days, then 10 for 4 days. I had unbearable pain in the knees, extreme hunger, insomnia, and a few extra pounds. Now that I am no longer taking it I sleep better, not as hungry, but my breast are extremly sore, and I have what looks like pimples on my arms, back and neck. Does anybody know how long the effects stay in your system? Are there side effects from not taking it anymore? Any commets would really help.