I got all kinds of weird responses from when I quit drinking and I also got the all clear from my doctor (at least for anything serious), I got muscle twitches, I ached in all sorts of random places, I was exhausted for weeks, I had crazy nightmares. So, yeah, I think your body can do a whole bunch of strange things while getting sober. If you're worried though, go see the doctor and explain how you're feeling, all it can give you is greater peace of mind after all.