As I mentioned before, I did this. I've been suicidal for 25 years, and have never called the hotlines....you have to remember, this was during the 80's and 90's...a whole different attitude believe it or not.
I called last September. It wasn't anything like I thought it would be.
Unless you just say "I think tonight is the night, and this is how I'm going to do it"...no one is going to call the cops on you.
1) they are not going to let you dwell on anything that puts you further in the mood, they are trained to guide the conversation.
2) they are not going to engage valuable resources i.e. police, fire, ambulance unless they feel pretty certain your getting ready to act.
3) they genuinely do want to hear what you have to say...and sometimes that's enough to change your mind.
Always think every action/reaction out thoroughly. What is the deeper reasoning behind you thinking about calling for help? You know it's a hotline, you know what their jobs are.
Hang in there brother, time ain't nothing but a thing.