I totally feel your pain. I suffer from severe depression, anxiety, and PTSD. It's so hard when you feel sad for no reason. I'm so sorry you have to suffer alone. Have you talked to a trusted loved one about It? And explain it to them in detail just as you did us and maybe that will help with the way they respond to you. Here lately, like the past year or so. I've been able to keep it kinda under control or at least make it a little easier to deal with by taking several long deep breaths and then praying. I use alot of bible apps. Theres alot of good ones out there. It really helps. God will speak to you through meditation on his word. I will pray for comfort and peace in your mind.. may God bless and watch over you and send your sheer joy and happiness.