I remember my recent mixed episode to be one of the most emotionally painful experiences that I have had in a long time. Perhaps it was an extreme version of mixed. It was a real nightmare. And I am normally very tolerant of emotional and physical pain. I almost lost it by checking myself into a psych hospital three days into the episode. So if this is what you are experiencing, I would have the doctor change your script ASAP, like yesterday. I think mixed episodes have the highest rate of suicide for this reason.
I do believe that meds can cause unpleasantly elevated or rapid changes in mood. For instance, I think antidepressant are known to cause this in some people. This experience is what is happening to me on Lamictal. I am finding to my surprise that Lamictal appears to be activating. But the alternative is a more difficult to deal with bipolar depression. I am finding that a dose of a fast acting AP taken PRN makes a big difference, when taken before things get out of hand.
Hang on there! I wish you well!