My bmi is too high for clomid :-(

I feel so alone and discriminated, I've been ttc for about 4 years now, I already have 2 children so ttc has not been a problem in the past, I was referred to a gynaecologist by my doc  because it turns out I don't seem to be ovulating although I get all the signs and symptoms,  anyway the gynaecologist won't prescribe me clomid because my bmi is very high, I'm doing everything I can to help my body to encourage ovulation, taking vitamins, I'm on a diet but as all women know losing weight is a long process it doesn't happen over night, I just feel so alone and useless and every month my period starts I just don't know how much longer I can go on like this, we are so desperate for a 3rd baby and just wish my body would work as it should, I'm 31 years old and feel the clock is ticking and can't bare the thought of not having another child :,-(