Hello. I believe I can be of help to you with this issue.
You are likely experiencing BOTH some withdrawal symptoms and fear/anxiety
reaction due to withdrawal 'expectancies' you have. Here is my favorite site for assistance with tapering off of the benzos such as Ativan (lorazepam)
What you will want to do is try to increase your exercise level (aerobic activity) significantly during this time period of tapering. Realize that withdrawal symptoms from most drugs are roughly the 'opposite' symptoms of your use effects e.g., sedative
effects associated with use are then consistent with anxiety and arousal effects during withdrawal. If you can get a partner or helper to sort of baby sit with you for a few days off and on, hang out with you and exercise to help manage your withdrawal and anxiety-like symptoms, you should be o.k. Also, if you go to your local pharmacy, for a few bucks you can buy a pill cutter, which will help you accurately cut your pill size/dose. Just do the tapering slowing, don't rush it, keep exericising during this period e.g., a couple times per day if necessary, and you should do just fine. Use the above website for assistance.
I hope this information is helpful to you. Please let me know if I have overlooked any aspect of your original question. Also, be sure to hit the green Accept button at the bottom of the screen. Thanks.