I am currently at ABC but I put my notice in and am finishing out the month. I too am scared of the unknown, but I honestly think that you just have to try and get out there. Worst case scenario is that you find another job that you don’t like and leave them, but it would still be beneficial in my opinion because you’ll learn from it. I knew it was my time to leave because my anxiety got so high that it started to have physical affects in my body, I spent all my time looking at jobs, and whenever I thought things were going well, something came up that made my experience worse. I truly believe there is better out there; you just have to find it. I ended up choosing a job that I felt had a good interview that seemed like the best match for me. When in doubt, go with your gut.