Congrats on five days clean.
I hope you find the "courage" to overcome your apprehension to NA. If you go, you will find that almost everyone there was scared the first time they walked through the doors.
Opiates are an insidious addiction and you need all the help you can. I don't think I'd take my mom. Find a closed meeting and tell her to pick you up afterwards. I will say this though, it's great that your mom is willing to go. It means she supports your recovery. My dad me kicked out of my house for drug use.