Ugh, sounds scary! I know vivid dreams can be side effects of SSRIs and SNRIs. The restless thoughts could be anxiety or possibly a manic episode? Out of curiosity, are you taking it at night or in the morning? You could try switching when you take it.

One other thought--were you on the brand-name before and are now on a generic? Or a different brand of generic than you were before? Some people (including me!) can be sensitive to small differences in generics--I had that problem with Paxil.

I wouldn't stop taking it abruptly for sure. Does your pdoc's office have an off-hours line that you could call in case you feel worse over the weekend?