Well I'll be damned. Your post resonates so much with my current situation! I'll try not to write a wall of text!
I'm currently working in education as a teaching assistant. I love teaching the kids at my school because they're highly motivated and engaged in class. Most of my days I'm really happy and motivated, but other days I feel so exhausted and drained. It's a real roller coaster ride. After doing this for a couple of years, I've come to realize that even though I do enjoy teaching, it just isn't the end game for me. Recently I've been thinking, "Do I really see myself doing this long-term? Am I passionate...dedicated enough?" Being a teacher, I've learned one has to be a role model, be self-sacrificial and always be on top of things. I've come to realize I want something more fulfilling, creative, flexible and liberating. I don't want an office job where I have very little liberty, be constrained by rules and do the same thing everyday.
I've taken the time to think of the things I enjoy and that I could possibly try to form into a career. So now I'm gonna build on my current skills and start self-studying towards that goal. This is also a way for me to not completely lose my mind haha. Gotta keep myself busy and motivated in some way! So what I've learned is that we just gotta keep trying things and not stop. The worst thing anyone can do when they're unhappy, is just settle. We gotta keep trying and trying until we find something that calls to us!
From your post, I can clearly tell you are an intelligent, skilled and successful being, so I'm sure you will definitely find a solution and thrive at it! You've already done a lot by applying to different jobs. This is huge! You're already enacting change, so give em a try and see where they take you. Something that I think might be helpful is to write down the things you want to do in the future and why you want to do them, and the things that you like and why you like to do them. I find this helps me find direction and the writing itself is spiritually liberating. Aside from that, exercising, reading and listening to music and dancing have helped me release all that pent up stress and anxiety. Try to find outlets that can personally help you! Wishing you all the best! :)