Sciatica

I was diagnosed with Sciatica in October 2005 and I'm still waiting for an appointment to see a physio. It's a nasty condition which has stopped me using my bike as i can't get my leg over! Well, i can get my leg over but can't get off without a great deal of discomfort and without worrying about dropping the bike. I currently have hardly any feeling in the 2 smallest toes on my right foot and tingling from my right bum cheek right down the back of my right leg. This tingling turns to pain and can last for hours on end. If you have any hints or tips on how to ease the discomfort, i'd appreciate them!