Here's a little addendum to my post to put my advice into some sort of context.
In terms of feeling like others are judging you, this is something I've struggled with a lot in the past. My anxiety and depression - which is a thing of the past for me now - stemmed from my father dying from alcohol poisoning, and the subsequent sexual/physical/emotional abuse from my mom's boyfriend who came into the picture after my dad passed when I was 7 years old. I was unmockingly voted quietest of my graduating class in high school, meaning that others liked me enough, I just didn't talk much. Many people cannot believe I was voted that these days (I'm 25 years old now). In high school, I spent a couple weeks in a psych hospital after suicide ideation and being self injurious.

When I speak of these days, these days are blessings. I've taken up writing, drawing, and playing guitar & singing which have helped me break through countless troubles. I can consider the past five years of my life some of the best years I've had, and I look forward to the prospect of tomorrow (just not finals week, lol).

I don't want to ramble on about my situation, but just wanted my advice to not sound like ********.

One last thing that I remind myself these days when I'm getting anxious about others judging me, in relation to you being at the festival: consider the reality and logic of others judging you. What is it that they are judging? Is it really you? Not at all. Even those that might know us well are only judging what is, in fact, an incomplete idea of who we are. We live out as intricate, but alas incomplete processes in the minds of others.

So when you think someone is judging you, just smile to yourself and be reminded that they are only judging their idea of who you are, not you.

I hope this helps. I find that at times, logic can aid in alleviating our troubles, whereas it falls flat sometimes. That's when expression and abstract thought can help - like poetry & art, the medicine of metaphors.