I'm an early (ish) career freelancer working in the arts sector. I was bitten quite badly around this time last year by an organisation that treated me awfully and made my life hell for quite a few months. The situation has been dealt with and I've moved on to other work now, but I can't shake the feeling that I've done something wrong, every time I pick up a new client. If I don't reply to an email within an hour I feel awful, I constantly worry I'm doing everything wrong despite managing to secure regular work and people singing my praises... how do I deal with this constant performance anxiety? Is it normal, especially as a freelancer, or is it something more worrying?