I take Ativan too. It'll help, trust me. I've had the "shaky inside" and "tense" feeling.
The diarrhea and abdominal pain take a bit of time to subside, try drinking 7-up, that's what I do. Helps a bit, and try drinking water.
I understand what you are going thru as I had diarrhea for weeks and lost some weight from it, but now it has tapered off a bit.
Are you on any other meds along with the Ativan?
"Be glad of life because it gives you the chance to love and to work and to play and to look up at the stars."