When a person is used to using alcohol so they don't have to deal with their emotional challenges, no longer using to avoid means now you have to finally learn how. This is why individuals that are working on being sober and staying sober are told not to engage in relationships for about a year. This is what your wife is going through, part of why she has distanced from you while she is in detox and getting sober.

There is the physical dependence which you have clearly been challenged with, and then there is the psychological dependence that takes longer to work on. This means you will genuinely be learning how to take things literally one day at a time. This is what your wife is working on and it IS challenging. Yes, there is often a time to adjust to learning how to sleep without the alcohol that sedated you.

You may also need to be tested for sleep issues, it may be that you experience sleep apnea.