Scared I’m hurting my baby

I’m 7 weeks pregnant and I have a 6 month old daughter. She’s not sitting on her own yet so I find myself having to hold her 24/7 with little breaks. The constant picking her up and putting her down is taking a toll on me. She’s also been going through a sleep regression and fighting me to put her down. She’ll kick me push of me and try climbing up me. I’m afraid this is hurting my new baby. I would be devastated if anything ever happened but my daughter needs me a lot right now. Has anyone ever dealt with this?