Grant,
The sciatic pain was severe, it did fade with time, a matter of weeks, 6 plus from memory before any noticable decrease, and gradually decreased over six to twelve months from there. Now I have some discomfort from time to time, but not pain. I can normally alleviate this with glute and hamstring stretching – lightly! I still get some sensation – tingling in foot, but it's not even a discomfort now.
I did ride probably too soon, but lightly and I remember it did antagonise things, but the pain was so sevre I couldn't really over do it.
It will get better, it may not seem it now but, in a matter of months you will be riding again, and your body will regulate what you can do. I feel as strong as ever now, I hope that is some encouragement for you!
I found just a general back massage by a partner was just as effective/therapeutic as a physio.
Oh, I had some muscle relaxing drugs when things were acute, they help a little – can't remember what they were though.
You will ge there, all the best.
Pete