Ameyers, What you are experiencing are classic Zoloft start up side effects. They will go away in a few weeks, some of them sooner. Take your Ativan, it will really help with the anxiety and restlessness. I take xanax with mine.
Did your doc tell you to just take half? The reason i'm asking is because when you do bump back up to 50 mgs, you will get a new round of side effects, much like the ones you're having now. This happens with dose increases. Just wanted to point that out to you so you don't get "freaked out" when you experience them again. Good luck! Fox