One thing that helped me to get through the anxiety was to focus on why I *wanted* to do the thing I was blocked on: it's fun. I enjoy it. The pressure of why I *should* and what I should be doing and what I should have achieved already etc was pretty intense, and I needed a break from that... but underneath was a layer of 'I want to do this. This is fun.' Rediscovering it was a long process, but ultimately successful.