As a person with an incredibly low sex drive who has gone through all the hullaballoo of blood testing etc., I can't say that I have found anything!
It started after my 2nd child and they tested everything. From what my last doctor told me, sometimes your sex drive just goes away. Now after my 4th kid, I have no desire at all
In my case, I never even think about it anymore, except for the fact that I think about why I don't think about it.
Do you have children? Apparently a hormonal imbalance after having kids can cause this as well as stress, weight gain and depression..... but there are other things that can cause it too.
Ask your doctor about herbal products (there are teas and pill forms) that "increase your libido". They work for some people.
Herbs to Increase Woman's Libido.
But like I said check with your doctor before you start taking herbs. They can mess with any Rx you may be on.