Lack of libido

Been with my partner for 5yrs we have a 3yr old but for a long time like 3.5 yrs sex has been on a downward for me, my libido has been dieing and it's gone its been gone nearly 2yrs. I have mental health issues which are better then they used to be by and landslide. I birthed my child via a c-setion don't know if that's any help. I just struggle I'm not interested I can't get interested, I've tried toys and lubes, talked to my Dr nothing they can do. Talked to my partner who has a high drive and just ends up convincing me into pitty fuck off leave me alone sex. I don't even enjoy the feeling any moreI. I hate things I used to like. I don't know what to do. Oh and if by some blue moon miracle I do have an inkling of wating sex, it goes when it starts or I get bored no matter what position. What do I do I'm only a 28f?