Sorry to hear you're having a rough day. My focus has been a bit better this week, but last Friday I was useless and had to spend part of Saturday catching up. I don't want another week like that.
I have worked mainly freelance for a while, apart from about 3 years where I had a formal work contract. For me, I sort of fell into it when I first moved to this country, it wasn't planned. You do have to put yourself out there and the prospect of being rejected can be scary. I would say over time, for most people, you tend to develop a thicker skin about the rejection aspect. I know I have.
If you ever want to talk about freelancing, feel free to message me. Maybe you can try to take on some smaller projects while still keeping your day job.