These aren't false memories as such, more The Fear taking a hold of you. And that's pretty normal. And sane to a degree. What is insane is that we repeat the same behaviour and put ourselves in danger of those fears becoming reality, often until they actually DO become reality and even worse things than we imagined start happening.
I'm so sorry things got out of hand and you're feeling how you are. In AA we use a serenity prayer. ..
God grant me the serenity to accept the things I cannot change.
The courage to change the things I can.
And the wisdom to know the difference.
Now, you cannot change whatever happened last night, but what you can change is the future, and allowing those fears of yours more chances to become reality.
Wishing you all the best. BB