Whats my problem? Answer maturely?

I'm 20 years old. i'm a firefighter/emt-I, a delivery driver, and a salesmen, going to college. I live at home, in my trailer, parked on the side of my parent's house, for now. Yesturday was horrible, It started when i woke up with a sore back, rubbed some icy hot on it, then took my morning pee. BIG MISTAKE. Then, I had a lunch date appointment with an ex girlfriend that said she wanted to get back together. I'm poor and don't have nice clothes so I took my paycheck, bought a nicer pair of pants, an new shirt, and a hair cut. The date was at 11:00. I waited till 11:45 until she texts me and says, not coming cuz I don't want to see you. I need a real man in my life. So, fine, now that my hearts just sank, I looked for a rebound, and called a girlfriend from highschool. She says to me that she's not attracted to me, and don't contact her anymore, sorry for leading me on. So, fine, now I'm feelin like ****. SO I go the fire station to cover a shift. I missed 4 IVs that shift. That depresses me because I miss like 8 out of 10 and am sick of it. We had calls all night, and I got one hour of sleep. Today, I was late for work, and my dad chewed my *** for an hour on how dirty my trailer is, and how I don't have pride in anything, and am a "slimy f###in pig.". Now I'm here, writing about it. I've been depressed for awhile now, and these last few days are pushing me closer and closer to the edge. Make me feel better please.