Serious mood swings in tenses sweating and indescribable anxiety is what I experienced the first few days of fent withdrawal. I knew it was serious shit because after years of the same cycle this one was worse and worse. After a couple days you will feel better and won't want to jump off a building or have a manic episode. It felt like my brain was going haywire and pumping adrenaline and god knows what else to fuck with me and force me to break. I tried some Kratom capsules the red vein and it helped significantly the first two days. Suggestion don't take too many because the vomiting will occur unless you have a anti nausea, but the Kratom will make it worse if u take 30 pills in a day trying to get relief. Take up to 4 see how u feel it won't take away 100% but it will mentally help or that's at least what it do for me. Honestly you have to not give yourself an option, keep forcing it into yourself that u have no choice and there is no ability to get anything and that you don't want it. The mental game is the hard part I found. I truly am proud u made it as far as you have and hope u keep going. Feel free to message anytime if u feel like your going nuts and need to vent! I'm right there with you!