I'm here not as someone who is currently in a funk, but someone who would rather show support. I think it is super hard to help someone via a message on a forum, but I applaud the moderators for trying, and I'm going to try as well here.
I've been in this situation before. I know the feeling isn't great. The going out for a walk idea is a good one, because it forces you to get out the house. I started that way, it kind of helped. What really helped take this feeling away, was 30 minutes a day of challenging exercise, for 30 days. What happened once I started forcing myself (due to a contract i signed with someone special to me), was that 30 minutes turned into 35, then into 40. I started losing weight, building more confidence, and having more energy. My life has now changed dramatically over the past year.
I know its easier said than done, but believe me when i tell you this, you have two ways of looking at it. It's easy to do, and its easy not to do. You have nothing to lose by doing it (exercising), and you have lots to lose by not doing it (bad health, less confidence, etc.).
People say mind, body, and soul. I say body, mind, soul.
I hope this helps you in some way. Stay positive and challenge yourself to grow.