Not coping

I'm 13 weeks pp and went back to work recently after my leave. I'm not coping well at all. I miss taking care of my daughter all day and while I don't necessarily feel guilty she has to be in daycare, I do feel like she would be better off with me and I miss her during the day. My husband watches her some days and he's great with her but I'm still constantly preoccupied with how things are going and how she's doing. It makes it hard to focus on my job as does not getting as much sleep. So I feel like I'm not even as good at my job as I was before. While I was on maternity leave my husband switched from a normal schedule to shift work so now our days off don't line up and on days he's working I barely see him (only an hour on some days). I feel like keeping up with the baby, my job and work around the house is just overwhelming. I breastfeed my daughter and I love it, but I hate having to pump during the day. I'm not unhappy just overwhelmed. I feel like things were so much better and I was so happy when I was home 24/7 but my husband doesn't agree with me being a SAHM. I guess I'm just venting but any advice or experiences would be nice.