Have to start somewhere

I been using opiates now for almost 6 years now, the last three being the worse. I went from vicodins to roxy codone to oxy conton and finally ex my ex boyfriend introduced me to herioin. I have never shot herion just snorted and I only get herion when I can't afford 80mm oxys. Today is day is day two of trying to stop. I'm a single mom and I'm just falling behind with all my bills because mya addiction has gotten so bad. I have to have at least three 80 oxy just to get me the week and whatever else I could get my hands on. The reason I started opiates is because I have always had anxiety I have had a lot traumatic and abusive relationships and that when I started using. I've gone to the doctor for my anxiety and she prescribed zanax but I was so far in my addiction that I couldn't stop. Today is day two being sober. I have only a 8 mm suboxine so I'm hoping that will get me through the physical withdrawals. Any advice on how to mentally prepare myself for what I am going to go through. I have hidden my ugly secret from family and friends so I don't really have anyone to talk to about this. I work full time so I can't take off work. I started taking vitamins and eating healty plus running 15 a day I have heard exercise is good. I'm more worried about the anxiety that I don't want to come back. I had such bad anxiety in the past and panic attacks that it affected me being able to go on interviews for jobs and just normal social situtations. I guess with the opites all that went away and I felt like I could do anyorrible addiction. I have my zanax but I don't rely on that my whole for anxiety. Any advice how to prepare or deal with the mental aspect of withdrawal is much appreciated.

Thanks