Please help me out, Ive lost it..?

You may be mortified to go to a Doctor, but if you don't, you may lose your partner. Nothing anyone up here is going to help you... you need to rule out any medical problems first, and if those turn out ok... then you need some counseling. If you don't take action and look into this problem, don't keep going along in your relationship thinking everything is ok.... your partner is not going to stay in a less relationship forever.