Pregnancy induced grumpiness??

Forget mood swings, what about constant complaining? No, not about the pregnancy itself, so far that hasn't gotten me down and I'm coming out of that little dip in wellness anyway. No, it seems that I have a lowered tolerance for other things in life, like work issues and 5th grade homework. I may sound like the biggest complainer on earth, and more than once I've said outloud, "pregnancy has made me meaner." While not a symptom I've read about, Grumpiness seems to be my most constant symptom. Hopefully it subsides in time for Christmas- I'd hate to be this years grinch ;)