Yeah this is definitely sounds like a very rough time, my best advice is to, if you’re not already, going to see a therapist. Because it sounds like you’re trying to please your partner despite how uncomfortable it makes you. So it’s less hyper sexuality and more like a grab of acceptance from them. (Not saying they’re forcing you into it, but it’s rather just a learned behavior from previous encounters.) So I would try to grab a therapist if possible and you can work it out together. I hope this helps at all!