Irrational anxieties

I am 21 years old and I have a long list of things that give me anxiety every day. Things like showering alone, open closet doors, windows without blinds and even the dark are just a few things that send me into anxiety attacks that are hard to come out of. When I’m forced to face anxieties that are out of my house it effects me for weeks. My hair falls out, my nails break and I get so anxious I can’t focus on life itself. My constant worry about things pushes over onto my relationship and it all just builds up. I’m so sick of being so anxious all the time.