Sheila,
I understand what you are going through, I know it is hard for you and I suspect that your culture places much importance in being married and having babies, having a man to take care of you. This is still a difficult world for single mothers. It is very difficult for a man to continue to feel loving toward someone who is not in his life daily. Men need that from women or they wander, even then some wander anyway. But only he can choose to be there for you.
Remember do not allow your fears to lead your life for you. Too many make decisions based on fear.
No one can put a spell on anyone else without their permission, even if that permission is unspoken, a person can accept a spell simply by unconsciously walking into it's energy without consciously think I do not accept this energy. But understand, men are trained to hold their emotions inside them anyway.
Again, I suggest that you do what you need for yourself and the baby, this is the challenge you already accepted and fighting it will not make it go away. The challenge is to learn to deal with life on your own for now. Learn how to deal with life responsibly and functionally as possible for you.
I suggest you go read the last post I made to Crystalious and go with that as well.
As far as his health and the magic, there is healing coming his way and I light a candle for you, him and the baby right now with many prayers.
Have a very safe trip. Where in the US are you going and where are you coming from/where do you live?
Blessings, Spirit Wolffe