Cut myself with kitchen knife last week went to doctor today with stiffness in arms and legs and sore neck doc says not to be worried of tetnus that its some kind of virus. Does that sound accurate?

Not exactly. He's probably right in not to worry as tetanus just does not present that way without the infection getting worse first and with constitutional symptoms. What is not true is that the cause of tetanus is bacteria, not virus.
Pain in limb. Sometimes inflammation or infection may cause pain swelling in the lymph nodes or muscle pain. If there are signs of infection like fever redness or abnormal discharge form the wound you should follow up with your pcp. Tetanus immunization is routinely given every 10 years or 5 year if it was a dirty wound.