Your son is a different age with this move than he was with a previous move. Where you moved to is different. Many factors influence how a toddler behaves. I understand your tense feelings. They are normal. Your son also feels them and he doesn't know what to do. Anxiety frequently causes a toddler to act out.
If your husband isn't working all the time he's out of the house, I suggest that you ask him to arrange some time to be home so that you can have some time to yourself. If he's working overtime, it may be reasonable to ask to work less. My ex worked for the post office and was number 1 on the seniority list. He could work as much o/t as he wanted but he could also decline. There were plenty of others who wanted the time.
Since you're new in the area, I understand not wanting to ask strangers to watch your boy. There are babysitting services that do background checks that you could call. The babysitter is probably going to be more expensive but I suggest it may be worth trying this out.
Also, perhaps you could ask for a referral from someone in your old town to someone in this town that they trust. Perhaps a pediatrician or minister who could then give you names of local people who could help.
I also suggest that you read or listen to the book by Adele Faber and Elaine Mazlish, How to Talk So Kids Listen & Listen So Kids Will Talk. Using their ways of talking with your son will help him deal with his feelings in a less destructive way.
If you haven't developed a daily routine with your son, doing so now will also help. He's feeling anxious/insecure because he doesn't understand what is going on.
I wish you well. You are on the right track recognizing that you feel like you're going to lose it. Pay attention to that feeling and find ways to reduce it. Perhaps taking your son for a walk or going to the park or even the mall when it's not crowded would help. Think of ways for him to get his energy out of his system for awhile. Then be sure he gets enough sleep and has good food to eat. Same for you. Getting enough sleep and good food to eat will also help you manage better.