You need to find a new doc asap. If you take your meds as prescribed, then you've done nothing wrong. Is he concerned that your taking a dangerous level or is he only concerned about being the one prescribing them? If you have a pharmacist you trust, speak to him or her, asap.

I am on opiates. I spent several years refusing them because the idea of them scared me due to a family history of drug abuse. I am dependent, but not addicted, and have been on the same dosages for years. I dislike meds that make me feel intoxicated, and luckily, with the help of my doc, We've figured out a combo that decreases my pain substantially. Pretty much ANY activity causes me to flare, so I do tasks for short bursts of time, and then wait till my pain returns to a baseline level in the 3-5 range, before starting again.

You shouldn't be ashamed that you need strong medications in order to have relief. But, you do need to be careful about finding an experienced RSD doc, and then developing a trusting relationship with him or her. It takes time for that to happen, and there are lots of non-narcotic option that will also, hopefully give you some relief. (You should only introduce one new drug at a time, don't allow them to try more than that.)

I'm personally not a fan of pain clinic docs. As a general rule, ALL of their patients are super needy, so they can become overwhelmed with their needs. Their practices are scrutinized for the meds they prescribe, and so some under prescribe. Find a doc that will spend as much time with you as needed. If you can find someone that performs Ketamine infusions, it's certainly an option to consider.