Nervous about my friend sending police

So hi so to put it in into shhort my friend knows my mental health is bad and i was venting to them, they live in america im from the uk. its an online friend, and basically because of what i was saying they said theyre gonna tell theyre therapist and call the police- but they dont know my city phone number email or anything, and its freaking me the flipping hell out. will the police come? ive blocked them. how do i deal with this