You poor thing. This is hard. But remind yourself it's only been a month.
Right now get some good books and videos. You have that hysterectomy coming up. Try to look at it as a chance to rest.
Don't just drop and pick your daughter up at school if that's what you've been doing. Stand around outside and try to strike up conversations with other Mom's. Volunteer at the school. It's the quickest way to meet other women. Help the teacher, room-mom, etc... Don't be intimidated by other women. Be yourself and you will find women like you!
Are you a political type? Join the League of Women Voters or campaign for someone. Offer to start a bookclub for your daughter. Call the other mom's to see who would be interested. Accepted helpers.
Hang in there. It will get better if you persevere.
I see babysitters may be a problem. Some things can be done in the evening. During the day with the kiddos...... find the closest mall and see if they have a play area. It's FREE and other mom's come. Especially when the weather gets bad. Go to the park as much as you can. Walk in your neighborhood and meet your neighbors.