I gave birth to my gorgeous baby girl on October 8th 2018. I'm almost 3 months post-partum and I'm also a single mama. So I'm not having sex, but also

I don't desire it... I used to be a Freakkkk, I used to love sex and exploring my body and my ex's (my baby's dad), all the time. We had sex all the way up until the day I went into labor. But after I had my daughter which was then followed by an ugly breakup, sex is just something that doesn't sound like a good time. Even masturbation. I've thought about masturbation but for some reason I feel guilty and dirty every time I think about it... is this normal?? I feel like I'm betraying my daughter and myself. It kinda grosses me out... anyone thoughts?