This thread is so important and even if it helps just one person it’s worth it.
i have been going for years and have done multiple festivals solo. However, one year I got there and after setting up had an overwhelming sense of dread and fear which came out if nowhere, it was pretty scary and at one point I thought I was going to have to pack up and just go home. Fortunately I was able to work through it and the rest of the festival was fine. At first though I beat myself up a bit for feeling so low when I was lucky enough to be at Glastonbury. I now realise that health and wellbeing is way more important. It really is OK to not be OK, even at the greatest festival in the world.
I hope everyone has a great festival, but if you do need help make sure you reach out. There are loads of people out there who will be happy to help. And, above all, be kind to yourself.