stressed to the max

I'm a stay at home mom of a 2 year old and new born. I'm so stressed out I feel like I can't handle it. I don't want to put them in daycare or go back to work but idk what to do. My husband doesn't get home until about an hour before my 2 yo goes to bed so almost the whole day is me by myself. I keep crying during the day and couldn't sleep last night because I was so overwhelmed and just so mentally and emotionally drained. :(