From Longman Dictionary of Contemporary Englishcrowd in phrasal verbif problems or thoughts crowd in on you, you cannot stop thinking about them on She shut her mind against the fears that crowded in on her. → crowd→ See Verb table
Examples from the Corpus
crowd in• More than 100 people crowded into the fire station for Thursday night's council meeting.• People kept crowding in, and one woman started to panic.crowd on• Just as his clothes were beginning to fit comfortably again, he saw temptation crowding in on every side.• Suddenly, she had a new set of memories, crowding in on her own.• My nightmares returned at a time when everything was crowding in on me and I couldn't cope.• The woods crowd in on me as I make my way along the ancient track.• Gloomy premonitions crowded in on me.• Up to then there had been little social division in towns and houses were crowded in on themselves in a formless way.• Gone are the units crowded in on top of each other, and dark central plazas removed from the city streets.• As demands crowd in on you it becomes increasingly difficult to keep things in perspective. 