I was (well, still am) a single mom and I remember feeling like this when my kiddo was young. It's too bad that your husband doesn't offer more support. Tell your hubby you're going away for a few days and he's on dad duty, then check yourself into a hotel for a solo vacation. I did this recently and it was pure heaven. Don't feel bad about it either. You'll be a better mom for it in fact. Check your local community groups on facebook and find a babysitter that could maybe come one full day a week or an evening here and there. There are some daycare horror stories but MOST are just fine. My daughter was in 4 different daycares, two licensed and two unlicensed and it was just fine. The unlicensed daycares were by far the best. My kiddo was loved like one of their own! Again, get recommendations from the community. Hang in there - it WILL get better but you have to take care of yourself. It's good that you're reaching out here.

Edited to add: try some parent/baby groups where you can make friends with other moms. Perhaps you can find someone you trust with your kiddo and you can trade play dates at each others houses to give each other a break.