After advice from this community, I actually left the house!
I just wanted to say that the people on here are so kind and amazing with their advice. After several people recommended exposure therapy, or to start challenging the anxiety or it would keep getting worse - I WALKED TO THE SHOPS. Yes, I was shaking, dizzy and anxious the whole time. And when I got home, it felt like the life had been drained from my body. BUT THAT MEANS I ACTUALLY LEFT THE HOUSE THIS YEAR AND IT'S JANUARY. LAST YEAR I LEFT THE HOUSE LITERALLY ONCE THE WHOLE YEAR.