Baby Scissum help

My name is Brandy scissum. I am 29 and married to the love of my life Jonathan. I have two beautiful kids a lil girl and boy. He has one son we do not get to see. I was forced to have my tubes tied after my son and now my and jonathan want a baby together. We need help to untie my tubes or IVF treatment to help our family grow. My husband is an EMT and im a stay home mom. We would love to have another baby together to love..