If you're having to deal with fear, you may be trying to deal with What? instead of How? when, truth be told, you already know you want to make some changes.
Exactly what about feeling terrible are you afraid of giving up?
Look at it closely, because it will probably be legitimate. Then ask yourself if you'd be willing to accept the same goodies if you didn't have to hurt yourself and others to get them.
Time to put the old brain to work. That old solution's worked great forever and a day, but it's entirely possible that an older wiser Falling Rain might be able to come up with a more life enhancing way of accomplishing it. Better to come up with two or three, to make sure.
Imagine doing those instead of the old familiar standards. Run through the new way a few times in your imagination.
If there are any hitches, plan around them until you have a way that works and which you can practice a few times all the way through in your head. Now add color when you run through it next time. Now add sound. Does it feel comfortable?
If it does, step into it in your imagination like a suit of clothes and run through it until you feel like you're wearing it.
At this point, you'll probably notice that you actually feel differently. Chances are that you'll have made the change you've been looking for, that easily.
Try it out, pay attention to how it feels when you've finished, and see if you still feel frightened. If you still feel frightened, ask yourself what frightens you, and rearrange that the same way that I outlined above. Make sure that at the end, you do not feel frightened, and that you feel comfortable and confident, and practice your new behavior if you'd like, in the world a few times to make sure it's as solid as you want it to be.
How's that for a suggestion?
It's a variation of some Neurolinguistic Programming techniques that are pretty effective. It's a variation on what they call reframing.
The fear is useful because it tells you that there are pieces that you still need to rework, and it shows you where they are.
You don't want to eliminate all fear. Fear of, say, hitting your thumb with a hammer is very useful fear to have, and you don't want to make that go away, do you? You want to keep that around.
Just to be clear about it.