Mario:
Don't give up, you still have a daughter to care for! Good things come to those who persevere. It may be dark today but tomorrow will be brighter.
A friend of mine who is extremely successful, both financially and personally, told me his father's inspirational words, "as long as I've still got a breath, I still have a chance." Take a deep breath, get some rest, and wake up tomorrow to a new day. Your daughter needs you and has obviously suffered substantial emotional trauma as a result of this. Don't add to her problems and grief by giving up. Life is a struggle, don't lessen your daughter's chances of success in life by teaching her that the way to respond to hardship is to give up. After all that has happened, she needs you more than anything in life right now.
BTW, in my JW days, I looked down the barrel of a loaded gun with my finger on the trigger. That was over 25 years ago. I'm sure glad I never did what I was thinking about back then.