Did you ever have any resolution to your problems? You describe exactly what I'm experiencing now. I too have bulging disc, have foot and toe cramps and even resting toe tremors in left leg only. Shots have been suggested but I'm worried the tremors are something else.
some of us on here with cervical disk problems have experienced a similar foot pain - we liken it to a sort of "charlie horse" that you can't get rid of, just goes away on it's own. it was suggested to me, by a friend on www.spine-health.com, that i try omega 3 fatty acid (fish oil). his doctor recommended it to him, we have no idea why it works, but it works. especially if you have nerve pain. i decided to try the omega 3 prior to having the injections (in my neck) and found that after taking it 2 days, my nerve related symptoms were greatly diminished, and i have not had the charlie horse in the foot ever since except for a couple of days i forgot to take the omega 3 - then i was back in debilitating pain again until i restarted the omega. i have no idea why this stuff would help. i did end up having the epidural injection in the neck anyway and it wasn't as bad as i thought. so good luck.