Sorry to hear about the tough times. This is not my area but I think the term chemical imbalance is kind of sloppy shorthand for all sorts of things. It is used to make people more comfortable with the idea of taking meds, rather than being the results of a specific test or more than a general understanding of the problem. You could argue hunger is a chemical imbalance.
I would get to a good program and be open to the use of one of the new
addictionDrug abuse and dependence blocking drugs even though some 12 step and traditional programs are down on them.
tg