Do any of you new moms feel like you've lost yourself after having your baby?

I dont know how to separate myself from the mom role all day. I literally feel like all I do is take care of my baby and work full time. when I'm working all I do is stress over my baby hoping shes okay and not crying too much over me not being with her. I do not get any "me" time as I have no family or anyone who will be willing to watch baby. My husband works opposite schedules so we often dont even get any time to ourselves. I feel like I'm losing myself and our marriage is going down hill. I dont know how to get myself out of this rut. The no sleep is also getting to me badly. My baby is almost 5 months does it get better?