Scared of sex

I think it is because of social anxiety, how do I overcome it, can it at all be overcomed? I am scared to get pregnant or I dont even know of what but I can orgasm only when my husband does not look at me or better is out of the room. This is sad because I am in deep love with my husband. Sex is painful physically to me but sometimes I relax and the pain disappears. I never have fantasies. I used to have them as a child but adult I cant fantasize of sex... This is weird. Nothing exites me and I dont know why. I kept telling it to my doctor and at the end the best thing he was able to think up is to have sex with me... He is a good professional cant believe a person can do something like that! (I refused him which made him angry ) I just dont know why do I can not think of sex, why nothing erotic on tv arouses me, why? Sometimes I feel a little exitement when I kiss or he caresses me but it it very little and disappears quickly. Do shizophrenics suffer from such disfunction? I have ocd and social phobia and shiz.