Loss of sex drive

Help!!!!! I have been in a relationship with my partner for 12 years. I never had a huge sex drive in the begining & have zero drive now. I have too point out that it has nothing to do with my partner i love him with all my heart. I have no idea as to why i dont have a sex drive i can assume it could have something to do with having 4 children (no regrets!!!) I find sex excruciatingly painful which i think is another reason why. I have been to the doctors and they can not find nething wrong apart from a tilted cervix. This problem has now caused a major problem in my relationship. I do not want to split from my partner & can't bear to think of us apart but i dont know what to do. If any 1 has any advice i would b really grateful.

This is a medical problem, and not something that you should just brush off. GET A SECOND OPINION. Go to a different doctor. I agree, it could be hormonal. And if so, there are things you and your doctor can do to make you feel better not only about sex, but about yourself. But besides that, having 4 kids will tire anyone out! Don't be so hard on yourself. But don't use it as an excuse either. See another doctor and get it taken care of.