Just wanted to send support your way. I experienced the same emotions after my first concussion 2 years ago. It's tough dealing with the physical symptoms, and then you have the emotional component as well. So many people just don't get it and we have to deal with that as well. Give yourself a break and remember you aren't alone!
One thing I have learned in life is that nothing is permanent. Even this time around, I am trying hard to find something positive each day, no matter how small it might be. Maybe it's a less intense headache than the day before. Maybe I'm not quite as dizzy. Sometimes it's just that I got through the day, period.
Hang in there