
Not having bands on those back molars is completely normal. Lots of people either never get bands on them, or get them halfway through treatment. Not sure why, but that's the way it's done. I've only got bands on my front molars right now, too.
I got my bottom arch wired last week. My worst day for soreness was actually that evening. I took some tylenol before going to bed. I haven't really been sore at all since then. My front teeth feel a little funny if I bite on them, but they aren't really sore, and I don't feel them at all if I don't touch them (which is most of the time, since my upper fronts are a full 7 mm out in front of them...).
Best of luck to you in the next week or so, getting used to things. Definitely go for the wax the minute you start to feel something not good. I had a few brackets I needed to wax, but after about 3 days I was able to skip it. So it usually doesn't take too long.