It sounds as though you have a struggle for control going on in this house. The best solution, of course, would be for you and the baby and your husband to move out... but if that's not possible, have you tried burning Indian Sage? http://www.asunam.com/smudge_ceremony.html
Sage is relatively inexpensive. I use it when I travel to hotel rooms for conferences. I am sensitive to "others" who have been in the hotel room before me, and by burning sage, I don't seem to get as many negative feelings in those kinds of places.
Psychic Book Stores and Herb shops usually carry it, and you can buy the shell or ashtray you need to burn it safely, as well. You might have to do it once or twice a week for a short while... I don't know that it will solve all these disturbances, but it might help quite a bit. And it won't disturb the GOOD vibrations.
(And thank you, David, for the fine editing job...)