Dear L.,
DO NOT take him back. Don't think that if he goes to "get help" it will all be fine. You did not get an order of protection for no reason. You must have a very big reason for it or it would not have been granted to you. So this sounds very serious. I wonder how many times you have taken him back already. Given the ages of your children, you probably have done that before and that is why you have the youngest children. Given your catholic upbringing, I don't doubt that if you take him back you will be pregnant again.
Once you have decided that you can't take him back, you need to think about what you need now to make it. You say that you don't have any family here. Do you have any family in Puerto Rico who would be willing and able to help you? Perhaps you have a good support system there. You need a support system more than you need a job. You need to be in a safe place for you and your children. Consider any alternatives you may have there. Are there any family members or trusted friends who can take your youngest children, at least temporarily, until you get on your feet? Think about it. Maybe you have some support that you may not realize.
However painful and against your religion it may be, you may need to consider divorce eventually in order to legally be eligible for child support, which you will need whether you stay here or in Puerto Rico. Child support is the right of your children and you need to fight for their rights. Be careful if you decide to go this route. Many abusive men tend to get more abusive or violent when they realize you are serious about leaving them. Please, STAY SAFE. If you have to go to a safehouse or move to Puerto Rico, do it. Think of your children.
If you decide to stay in the US and find a job, you sound like a skilled woman with lots of training. There are many jobs in the medical assistant field for people who are bilingual. Fix up you resume to emphazise those skills. If there is a big university hospital in your area, you may want to check their website for positions available. They are always in need of bilingual medical assistants so, you may have a good opportunity there. Hope this is helpful to you and your children.
Te deseo mucha suerte y bendiciones en este momento tan dificil. Si necesitas mas ayuda, por favor comunicate.