Well that just sucks, Mars! Sorry to hear you're having such difficulties and so young! Have you been to see your neuropathy specialist lately? Or your Endo? What are they suggesting? Are you on any specific meds for it?
Have you checked to see if you're going low when your legs get weak? I know sometimes it can take just a burst of short, fast walking to see my BGLs drop quickly. "Jello Legs" usually sees me testing quickly
I'm MDI; not on a pump so, I'm not much help with pump regimen suggestions. I'm not familiar with QC10 or L-Carnitine but wonder who suggested you take them and why? Are they for neuropathy?
Not much help at the moment. Maybe more detail on the neuropathy side will see a few more folks jumping in.