Hi, i'm new here

but not to pain
I'm 21 yrs old and was the victim of 2 car accidents in dec. of 2001. Yea, 2 car accidents in 2 weeks time(Neither of which were my fault)!!!!! I was pretty shaken up but here are some of my problems that remain to this day. From the first accident(i rolled the car) i had a knee injury and in jan of 2002 i had surgery (meniscal repair) which was successful.
During my recovery time, the doc put me on oxycontin 20mg. That medication was the only thing that i have taken yet that has done any real improvment on my back pain that i recieved from the SECOND accident where i was in the passenger seat and a guy struck right behind me in the rear right passenger door. I've had steroid injections galore, a discogram, physical therapy, chiropractor, and now i'm currently in a pain clinic.
The doc has me taking 8 vicodin 5/500's a day. First thing is i'm worried about all of that tylenol. I know that 4000mg a day can't be good for your liver. Secondly, it doesn't seem to do much for my leg pain either. They said i had nerve damage and DDD in my L4/L5 and L5/S1 disc's. Also after my knee surgery, i had a hard time getting my knee straight because of my back pain, and the exact same for my back because of my knee. My nerve pain is on the same leg that i had the knee surgery on. My knee feels fine now but my leg from my buttock down to my calf (and foot sometimes) is CONSTANTLY in pain. I rate it about a 7 on average. It's really getting hard to deal with considering that i have a 3 yr old daughter i have to constantly pick up and care for. I also have classes i go to 5 days a week where i have to walk around the college campus.
It took me long enough to convince the doc that i was really in pain, and i know my age didn't help any as he thought i was just looking for a "FIX". After he did the discogram he has been a lot better as i guess he saw that i really was in pain with that test.
What could i say to my doc or ask for to help with all this pain. The vicodin takes my pain level down to about a 5 but in class it's still awful hard to concentrate and it's really interferring with my life in general from my marrige to my school. I'm always cranky because of it and i feel like i've tried everything. The doc offered fusion to me but that seems a bit much and besides, i can't miss school right now for the recovery period.
I appreciate any and everyone that responds here. I feel like i'm at the end of my rope and have nowhere to turn. Any advice is welcome.
Thanks and by the way, this really looks like a great place.