I just recently bought my first gun (glock). I loved the challenge of target shooting and the fun of it that I bought a .45 a month later. It's always good to get to the range and improve your skills.
Sometimes it's just a case of having some loose parts. Make sure everything is tightened, and if that doesn't work then follow the advice from the guys above.
I think it's a definite concern. My home now has this problem, and every winter we have to keep space heaters in a couple of the bathrooms. Otherwise the pipes freeze and the toilets won't flush.
Sounds like you had a bad placement of that shower. I have the same problem, and nobody could give me a suggestion that helped, so I just attributed it to bad luck and placement.