Storm, I am so sorry you are having this much pain. I do not want to sound negative and this is only my opinion, but if I went in to my doctor and told him I was self-medicating and took a months perscription in 2 weeks, he wouldn't be to happy with me, in fact I'd expect to be let go. I do think you need to tell him your meds are not covering your pain and then let him decide what the next step is. I just don't want you getting into trouble. See what the others recommend. Believe me we've all been there where our meds are not doing the job, and it's tempting knowing that one more will help, but we have to follow the doc's orders. They trust us to follow the directions and we can't afford to lose their trust.
Again I'm sorry you are in this bind and wish you all the best.