if you feel as though you are going to hurt someone, call the police and tell them you need to be taken to a hospital. I know it sounds bad, but they can take you to get the help you need.
This member is right. You really do need to get yourself to hospital, where you can get the help that you need.
Please don't stop taking your meds without the advice of your psychiatrist as this could be harmful to you. In any case, as far as I am aware, permanent sexual dysfunction is not a side effect of Prozac. Any effects, as far as I know, are temporary, and surely this is a low price to pay as opposed to feeling very ill. I'm wondering if you told your psychiatrist the whole story, as he can't give you the help you need unless you're a hundred per cent honest about your symptoms.