Starting to have doubts

It's been about a week and a half now, and to be honest, I don't really feel any different. I've been told it's a gradual process, so it may just be too early. Here's what the process is when I go in for treatment:

• She asks me what levels of pain I am feeling (there isn't usually pain, just a lot of stiffness)
  
• She puts these "muscle stimulator" electrodes onto the trouble spots on my back
  
• After 10-15 minutes of this, I am sent to another room where a massage therapist works out the numerous knots around my shoulder blades.
  
• Finally the chiroprator "aligns" my spine by either manually pressing or using a little device like a hand-held jackhammer (not really a jackhammer, since it's manually operated at a much slower rate). The most alarming part is when she twists my head to either side, usually producing numerous loud cracks.
  

I'm still trying to think through the logic...

For the past several years (about 10!) I've woken up with a stiff neck and shoulders. It's worse if I try a pillow that is a little more elevated than usual. If a misaligned spine were the cause, wouldn't a couple weeks of treatment start to show at least a tiny bit of gradual improvement in the morning neck stiffness? Wouldn't the rest of my body feel more beat up and stiff, not just my neck?

To be honest, I feel very limber and relaxed after the chiro visit, but I think it's because of the massage. The massage therapist really works hard at the knots, and it's really the muscles that are stiff. If I'm waking up with stiff muscles already, then it means they did not get a chance to rest all night like they were supposed to, which indicates some sort of incorrect sleeping position.

Come to think of it, the chiropractor has never asked me what kind of pillow I use or how I prefer to sleep. She's only recommended rolling up a towel and placing it at the base of my skull and putting a pillow under my knees (or if I'm on my side, between my knees). That towel was really uncomfortable and was not a reasonable solution since I couldn't sleep at all.

I keep forgetting to mention that the towel roll doesn't work, hopefully I'll remember when I see her later today. If she just keeps on doing the same thing, then I'm going to start thinking she's not really dealing with my problem at all. In the meantime, it occurred to me that I might be using the wrong kind of pillow. If certain pillows make my condition worse, then there has to be one that makes me feel better, right?