Turned in gun...

I turned in my fire arm last nite to the city police headquarters.  It was scary; when I got there I parked in the back and called dispatch.  He said 'someone' would be out.  Well 10 minutes later, they sent half-dozen officers; one with weapon drawn.  They asked me to get out of vehicle and put my hands behind my head.  I thought they were gonna hand-cuff me and drag me to a holding cell!  I explained that I only wanted to turn in my fire-arm for my own/and my family's safety.  They wanted me to come in and they asked lots of background questions: why did I purchase gun, what sparked the suicidal thoughts, etc.  Then they called in a mental health expert who asked me the same questions and did a mental eval on me to see if I needed to be hospitalized.  I convinced him that I am functional and that I am seeing a therapist, I go to a local support group for BiPolar/Depression, I have people's numbers that I can call if I am at a 'low-point', etc.  Long story short they let me go home.  It took about 1 1/2 hr; got there 8:45p and left at about 10:30p.  Spouse/family didn't know where I was and no one knew about gun. 
I am somewhat relieved the gun is out of the house; didn't want my 10yr old stumbling on it or anyone else.  That would've been catastrophic!  My mother-in-law just got here a week ago and will be here til Dec. - so it might've been more like armaggedon!  I not sure if I'll get my gun back or the process it would take to get it back and I'm not gonna inquire right now.  I still think it was my quick ticket outta here when/if things get worse, so I feel very vulnerable & exposed...
Everyone keeps saying that things will get better but I just can't see how; my faith is very weak and I'm still in this dark chamber of depression.  If I lived on my own, I probably would've kept the gun...