@Quagmire if you haven't already done so, get into marriage counseling, immediately. Find out the reason(s) she is unhappy with you. Do something to meaninfully change and improve. Take medication if necessary. Talk to your priest. Most likely, in my humble opinion and personal experience, she doesn't feel loved, for whatever reason, and that is driving her negative behavior.
You may feel you are doing your part (hence the comment about three jobs) but men often make this mistake and feel justified without considering the womans perspective, which may seem unfair or illogical to you. Women need to feel loved, and men need to feel respected. When that breaks down, all bets are off, but if you truly love and care about her, which you better as a Christian, as your wife and mother of your children, don't feel sorry for yourself and don't allow this to happen.
Stand up, be a man, do what you have to do, and save your marriage. If it doesn't work out in the end, you did everything you could, and God sees everything. Losing earthly possessions or money is of no consequence for a Christian. God will provide what you need. Do not give in to negativity and despair. Pray, and trust in the Lord. Fear is the mind killer.
You are welcome to DM me for advice and support, and I know the community will do whatever they can to help. Hang in there brother.
Mods, please feel free to move these comments to an appropriate place as this is meant to be a welcome and introduction thread.