I have an unhealthy obsession with being busy (its killing me)

I have various things to do. School(fulltime), work (I have one job i actually do in person---since i have really bad social anxiety i ended up going back to my old job, and a few jobs I do just mainly online, so more than one job), I like volunteering so I have a lot of places I wish to volunteer. In fact, I've already applied/am doing the work. Mostly for vet experience because I wish to become one. But I think I'm overdoing even that. I'm applying at more jobs in my desired field because none of them seem to want to hire me but I'm hoping as my resumee grows it'll help. I run my own website.... I do a lot. I have a boyfriend, too, that I need to make sure his needs are met. Today, I feel really stressed and I'm wondering what the heck is wrong with me and how do I stop?

Also, I try to manage my self-care routines...on top of it all
My doctor is not all with me on this, as well (he says I need new medications, etc, but hasnt't told me a lot) and I'm waiting for my appointment with my new therapist (I switched)

Make a detailed schedule for a week in a daily planner sheet including consistent time to go to bed and time to wake up. Budget your time in a day between wake up time and bed time. For example: Monday=50% school, 25% work, 10% volunteering and 15% for household and personal necessities; Tuesday=40% school, 35% work, 10% volunteering and 15% for household and personal necessities; Wednesday . . . Then enter those actual times you do those budgeted activities in your daily planner. Place your schedule/planner in a place where you always go to like bathroom mirror. You have to be strict to yourself to follow your schedule. Whenever you have extra minutes from your allotted time for school or work, use them for your personal needs.

I hope that will enable you to have proper control of your time to reduce stress.