If you're in the United States, then there are many domestic violence programs available to help you find shelter, relocate, get a low-cost divorce, get a restraining order/order of protection, and find counseling. If you have legal custody of children, you can get assistance with that, too - whether you want to keep the children in your custody or not.

If you're in another country, find out what local and national programs are offered.

Also, in the United States, if you are a victim of a crime, you can contact your local Victim's Advocate or Victims Rights center, which is connected with Criminal Justice. They also offer compensation to victims, regardless if your victimization has been substantiated in a court of law (in most cases). But you will need to file a criminal report with local law enforcement to do so. A domestic violence agency could help you with that process, too.

It sounds like your husband has an insecure attachment disorder of some kind - perhaps of the disorganized kind, and that maybe he is also leaning toward paranoid personality (accusing you of cheating when you're not). He could also have a narcissistic personality, too. Only a therapist could truly diagnose those things, but your description of him sounds like it will escalate into him demanding more things from you to the point where emotional abuse turns into physical and/or sexual abuse, including possible life-threatening verbal abuse and attacks. You truly need to find help through a domestic violence agency because, as statistics show, if you try to do this on your own or even with the assistance of family, the victims of such abusive relationship often wind up murdered - especially if the police are called without you having support to remove your belongings. In most of these kinds of fatalities, however, the victims almost always return to their abuser the moment they are released from jail. Most abusers are jailed, not imprisoned, which means that their sentences are short (ranging from a few days to a few months). Some get out without your knowledge. If a criminal charge is filed once you've moved out, the filer may not be aware that there are certain protections that can hide your new location, especially if going through custody battles, divorce battles, etc. You will need further assistance to ensure that he doesn't know where you live once you move out, even if you haven't dealt with divorce and custody issues yet. This is where domestic violence agencies can help, and where laypeople (like those of us online here, who are well-meaning, but not trained in specific domestic violence trauma, can really save your life and prevent fatalities). People like him are possessive and potentially fatally dangerous. You need to get out as soon as possible, and you need to make sure that you clear your phone's and laptop's/computer's cookies so that he doesn't find out about your posting here. There are many things you need to do to protect yourself.

You also don't want to be criminally or otherwise civilly liable for your children's endangerment, should you choose to leave him. Many female victims of domestic violence have been charged with child endangerment when not protecting their children from their abusive paramour or spouse. Sadly, while unfair, given that females are often victims and can barely defend themselves, let alone their children, the women get punished more than the abusive men in such cases. Domestic violence professionals will be able to help you deal with the legalities of that, too. That way, you won't be charged as a perpetrator yourself and face having at minimum a record that will prevent you from getting certain jobs in the future (which some abusers will use to their advantage as a form of their "revenge" on you for leaving them), or at worst jail or prison time. It depends on the jurisdiction and your country's laws.

Get help from a local and/or national domestic violence agency immediately before you make any decisions! They are the ones who can help you out of this mess safely.