Good for you to pursue this on Monday.
It's not nice, but putting it off might just make it worse (maybe - and we don't need worse!). Good that you already have the medication though...
I had the rectogesic, and I read somewhere that it can take some time to take effect (like a week or more, I seem to remember reading). I don't know if the diltiazem is the same? Keep using it - and take the 3 baths a day (ok, well, I only took 2 a day usually, except for one really bad day I took 3). Really warm (I was sweating in the bath tub). The rest of my day was spent sitting on a heating pad (or laying down with it wedged you know where). The heat really provided some relief.
I tried to spend as little time as possible on my feet - the tightness was just too much. Can you do the same?