Just thought I'd add my 2 cents worth, you talk about expecting a BIG change on antidepressant meds, well I have to say in my experience that such a change is rare. Antidepressants are not normally so effective that the patient notices a huge change, normally I tell patients to expect a slight increase in their ability to cope with the stressors of day to day living, nothing more. Also it is very common to have to swap a number of different antidepressants till you find one which works for you. This is simply the nature of managing an illness whose symptoms are subjectively felt by the sufferer, but is very difficult to measure clinically. On top of this there are so many factors that can impact on mental wellbeing, that you may start to feel better but not be able to identify any single cause.
It maybe irritating having to try different drugs, and the side-effects can be annoying, you have to measure the potential impact of the drugs negatively against the possible benefits to your mood, but if you have expectations of a wonder cure, Im worried you maybe dissappointed.