Im sorry for what brings you here.
This is a lot to deal with. Your health and the health of your children are the priority. You have 3 lives that you are going to be responsible for and his addiction to pills is not anything that is yours to take on. Take care of yourself, your toddler and this unborn child (If you choose to have a child) You all deserve to have structure, peace, love and a life free from the chaos of addiction.