Does nausea, body aches, headache, backache, and itching after having versed for surgery signify an adverse reaction? i had all of these after my surgery and they lasted for hours?

Yes: All those symptoms sound fairly typical, EXCEPT the itching. That may signify hypersensitivity (allergy) to midazolam. It’s a good drug, but for some people there are risks. It behooves you to go over all this thoroughly with your primary-care doctor and it needs to go in your chart. Also tell any future surgeons or anesthetists. Any future decisions re anesthesia should take this into account.