Three hours and nothing. I know that feeling as well as I know the feelings of anxiety, panic attacks, sadness, weeks without end of feeling dark and low. Believe me I have been there. I'm 55 yrs old and still have issues as a result of memories of an abusive father that had his way with me and called it love.
For starters know that there are so many people in the world that have gone through what you are dealing with. You are not alone. Reach out. Get out of your box and go be around people even if it is only to go to the mall and see people being happy.
Second, get help. Go to the damned hospital if you have to, but be warned they may want to stick you in the psyche ward and give you a bunch of serotonin reuptake inhibitors telling you there's a chemical imbalance in your brain. Personally I think they should take their medicine and see how they like it.
Third and probably most important is to pray. Pray to Jesus Christ the creator and ask for the Holy Spirit of God to comfort you. I know it may sound corny or bent or like a crock of shit even but God is. ... Find a church and go. Find a church that has the spirit moving in it not one with a bunch of statues and dead relics full of dogma and condemnation. God is love, real love, and has a plan for you to be joyful.

It took me a good number of years to find forgiveness in my heart for the things my father did to me. He raped me, beat me, humiliated me in public, beat me with a switch one day until I was bleeding in front of all the neighbors.
For just as many years I was angry at God for allowing that to happen to me. Today I realize the depth of God's love for me and for you. Somehow, I call it true magic, but somehow I now empathize with Jesus suffering on the cross, and delight in that suffering to know He did it for me, for you, for all. Don't let despair rule your life. Find the joy of the Lord and share that story as well. Know that Jesus suffering was not in vane, that He conquered death, and tho He not be here now has left us with the Holy Spirit to provide us strength and courage and a beacon of light to help us find our way out of the darkness. Draw near to that light and you'll find you are royalty and heir to God's resurrection power.
Last but not least and just as important as my preaching. Get yourself in to see a good therapist, one that will help you find some skills to cope effectively in a world gone mad.
Praying for you.. Hope some of my words provide some solice.