These would be pretty severe alcohol withdrawal symptoms. Having to get mainlined ativan would have been from the ER docs afraid you might start going into the seizures and the other so you didn't have a stroke.
That's great to hear you have 2 years clean! I would use your past experiences as a reminder to make sure you never have to go through it again. Alcohol "kindling" Is a real thing where over time the withdrawls get nothing but more and more severe.