Let's say you were sleeping, then in the middle of your sleep someone suddenly phoned you. You were a bit surprised, as what we normally feel when someone called us while sleeping , and you responded:
''Hello, I'm sorry I just woke up so my mind is still picking up''
Are the bold letters correct and if they are the same as ''regaining itself from its usual mental state''
Best Answer
That's not an idiomatic way to say what you wish to convey and, while it might be understood, it may cause some confusion.
More easily-understood phrasing for that might be:
The last of the three would probably be how I'd phrase it.