New Here suffering from Xanax withdrawl

As of Jan my insurance co stopped covering my xanax extended release that I take at bedtime. I have bipolar disorder with anxiety and panic attacks. I was having panic attacks in my sleep that I couldn't breath and my heart would be racing but I couldn't get myself to wake up. I was taking 3 mg of the xanax er at night and up to 3 mg of xanax during the day. I haven't told anyone in my family let alone my dr that I realized I am addicted to xanax. I am terrified there won't be anything else I can take for my anxiety and panic attacks. I didn't realize that xanax can cause insomnia, that explains why I can't sleep more than 2 hours at a time. Today is my first day after not having the xanax er at night time. I have already taken 1 mg of my daily xanax but am shaking and can't keep still. Can anyone offer some advise or support to help me get through this? How long should this last?

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