Hi brother - I don't know what exactly they labelled you "diseased thinking" for, nor how your true needs and struggles compare to what the system says you need, but strong relate here. I've also survived the abduction, incarceration, and assault with drugs known as "mental health intervention" in Amerika.
Usually it's a matter of bluffing - I expect that I'll have encounters with cops, wannabe-cops, and other busybodies with some frequency, so when it comes down to it I know how to tell them what they want to hear. Let me ask, is there some particular reason cops would want to arrest you, do you have a warrant out or a court order to be in "treatment"? Unlike some criminal warrants - the court orders about mental health from one state, often won't show up in another state if you're stopped and asked for ID. But if you're on prescriptions you depend on taking regularly - it's common for cops in some places to withhold these from you if they keep you in a cell overnight or for the weekend, and I wouldn't want you to go through the hellish experience of abrupt withdrawal in jail.