Are Percocet And Baclofen Effective In Treating Chronic Back Pain?

I am taking Percocet 5/325 mg. for a severe chronic back ache. I was told originally to take one at bedtime. I have been waiting to see a pain management doctor for two months and am almost there with my appointment on this Friday. Having had to deal with snow storms and the clearing thereof I have exacerbated my pain level. Generally my daily meds use is one Baclofen 20 mg. with breakfast (usually between 8 and 10 AM). On most days that will get me through the day along with heat pad treatments. I normally would take 1/2 of a Baclofen and 1/2 of a Percocet prior to going to bed. With the increased snow removal activity I have resorted to 1/2 Baclofen and 1/2 Percocet around supper time (Usually around 6 PM) and repeat prior to going to bed. I am simply trying to determine whether my med treatments are sound, or should I be doing otherwise? Thank you, Marc