I would consult another doctor for sure. At the end of the day, the doctor can give 100 patients
meds and know what they are supposed to do or what they can do, but they dont know how you are responding to them.
I would keep a diary of the changes and consult another GP (Doctor) because this is YOUR body and YOUR life. Getting sacked from work, or into trouble from the police for example, because your doctor keeps changing your meds wont be seen as an excuse, and this kind of thing can really mess your life up.
Cheer up cherub, I know it can be difficult and confusing especialy finding a medication that can be effective, as less addictive and in-expensive as possiable but you will get there.
Some doctors although 'specialists' like to play around with mediciations and 'fine tune' dosages ect, this is ok as long as they dont rush you, because at the end of the day, he can close his door at the end of the day and drive home to his life, whereas you are suffering in a sense because of his 'experiments'.
It's better to light one small candle than to curse the darkness