As far as the drugs go....sometimes they will do that to you at first and then once your body gets used to it then you're fine.
When I started taking Modulon for my IBS I was loopy for about 2 weeks and now I have no side effects at all. Your body probably just needs time to get used to the new meds.
Hang in there....try not to be too scared about the tests...we always seem to freak out more than we need to and it ends up going much better than we thought in the end right?