recollect (oneself)
To remember or become aware of one's purpose, intention, or situation, especially after a momentary interruption, diversion, or distraction; to become recomposed. The protestor's chants threw the presentation into chaos for a moment, but the speaker soon recollected himself and carried on as before. She appeared to drift off into thought halfway through her story, before recollecting herself and picking up where she left off.
recollect (oneself)
To become aware of one's immediate situation or purpose after a distraction: recollected myself after the interruption.
re-collect (oneself)
To become composed again, especially after one has been flustered or confused.