What to do next? How to file Temporary Orders?

I don't know how detailed I need to be. When I first filed divorce my husband was living with the other women but since ended that and moved back home to the spare bedroom. One minute he tells me how boring I am and how he wants to be able to pursue other women and then the second I want to talk about divorce he goes crazy and talks about killing himself (and I have it recorded one incident from May 22 at 7:22pm). It happens frequently and it has been over 40 days since I filed. Most recently, I was trying to get evidence for a temporary restraining order because things have gotten very heated and he has put his hands on me (around my throat at one point). I never feel as if I have enough evidence to call or contact the Police. And when I did he forced my phone away from me and deleted it all! That was me trying to prevent violence by saying I was recording him and it just made him curse and yell more and take away the phone so I couldn't record him which was scary for me. He did recently buy a gun and always makes threats to kill himself with it. It is beyond stressful. He has mean things he does like call me "evil" for thinking of putting him on child support (in front of the kids on Mother's Day). He yells about how he will NEVER pay me child support while the kids are around. I found his weed in the house the other day and freaked out and started asking family if I could call the cops and they all recommended me NOT to because I can not prove it is his. What can I do to protect myself and the kids from his destructive behavior at this point? My 4 year old has started to potty on himself. I'm applying for welfare and trying so hard not to let my emotions get the best of me but it is already effecting the kids negatively. I have sought out counseling and been thinking about mine and the kids living arrangements. Talked about selling the family home even though I do not think that is in mine or the kids best interest.