Dangerous Situation: Dual Benzodiazepines / Morphine addiction

I am a 46 year old male who has been taking Xanax 1 mg tabs 4x's per day for about 1 and 1/2 years. I have had anxiety and panic attacks since I was a child. Though Xanax has helped them almost completely go away I feel the need for more of them especially when it comes to helping me sleep. I also have some insomnia issues. I can definitely can tell when I do not have enough Xanax in my system by the uneasiness feeling I get mostly in my feet. My feet also will twitch at times and I get the sweats. On top of all this back in October of 2008 I feel of a ladder on a driveway where I have two compound fractures of the L1 and L3 vertebrae. So I have been on two types of morphine for 3 years and 5 months. One I take 4x's per day it is a fast acting type. The other I take 3x's per day and it is a slow release form. I feel like I should come off of these meds because of the way I feel if I start to get nervous waiting for the next refill to come or if I am having a bad day taking more than prescribed. So my tolerance level is fairly high for all these meds. I am scared to tell my doctors this for fear of they will completely take me off of the meds and have some serious withdrawals. I am just scared all the way around. Please any advice would be helpful. Bouy63