Hunny...I haven't read your thread till now because I knew it would be hard. Your grandparents are standing up for you in a way that is right and correct! This is FAIR. What your "husband" has done to you is not fair or correct. Be so very glad you have your parents and grandparents in your corner. When I called my mother to tell her how unhappy my marriage was, she responded coldly..."You've made your bed, now sleep in it!" I had a small child, a daughter, and I was trapped. You are not!
Do what is best for you and your daughter. Stop obsessing about what HE is doing on Facebook...looking for other females. He's a cad. He left you at the most vulnerable time of your life, at 8 months pregnant with his child. Focus on what you need to be comfortable, legally. Get a good lawyer in your corner, if you don't already have one.