YANBU at all.
With my first, I couldn’t even bear my husband being out with the baby for the first 3-4 months, not even for a quick walk around the park. My primitive/protective urge to have my baby in my vision at all times was immense.
I first left him when he was 10 months old and I was going to a works Christmas party. He was home with my husband and so was obviously fine but I felt anxious all night.
The first I left him with someone other than my husband was when I went back I work and he had to start going to a childminders house. It was soooo hard! I spent many weeks crying and feeling so guilty for not being with him. He was absolutely fine though.
The first overnight sleepover he has was when he was about 3.5 years old.
Things were very different with my second son and I felt so much more ease leaving him with other people, but not until he was about 7ish months old and only for short periods.
But yes, with my first baby, my desire to have him with me was absolutely overwhelming. I think it may be good to start considering leaving her with someone else other than you or your DH, even if only for 20 minutes to begin with, but you absolutely don’t need to start thinking about having extended periods of time without them. Especially with you not having to go back to work.
Just take it slowly and put having sleepovers completely out of your mind for at least a few years.