[ She was more referencing her hibernation as a problem that's impossible to solve, but if she says that then he won't love hearing it and she deeply doesn't want to have that discussion again. ]

Getting memories back suddenly, even one by one, is a shock to the system in my experience. We all went through it where we were last, and when you experience them in that way, devoid of all the surrounding context, it's more apt to cause distress.