Sometimes I write down all my goals when I have a lot I want to accomplish and I don’t know where to start. It sounds like you have the current work issue, the stress of possibly going to another job plus school you want to finish. There could be some big decisions and commitments to make here. Would it help to write down a list of pros and cons to help decide whether you really want to stay at this current job? There have been times in my life that it was best to stay where I am and there have been times when it was best to step outside my comfort zone. Timing is everything sometimes.

Also, are there some things you can do to help build your confidence and improve your communication? Join Toastmasters maybe? Join some Meetup groups?

Good luck to you!