I was put on 72 hour "hold" for SI, I wasn't suicidal or homicidal, spent the worst night of my life in the psyc hospital, once I saw a psychiatrist the next day he quickly let me go. But I was locked up just for SI, and it was made very clear to me that in my state WI, any SI event in the past 72 hours or a perceived risk of it in the next 72 hours is enough to get you locked up.

I'm glad you got checked out by your doctor.