Oh, boy, yes!!! I just had our third boy last Friday and he was due the Tuesday before (so only three days "late," but my last was 3 weeks early, so...). I was SO cranky all the time!! My husband talked me into leaving work a week before my due date since I was working full-time and using all my patience and energy there and then being a complete and total nutcase once I got home. I'm not sure that being home full-time and 9 months pregnant was much better, but at least I wasn't risking saying something inappropriate to a client at work.
I felt huge with this one (I did gain about 40+ pounds and had only ever gained 30-35 with the earlier 2), but I think being on your feet after toddlers and/or preschoolers makes a huge difference. I felt like I couldn't hang over the side of the tub to bathe the boys, could hardly sleep (propped up on the couch with lots of pillows was best for me), couldn't roll over, couldn't exercise (even going for walks he was banging his head down into my pelvis which was causing sharp, constant pain), spent half my time at work in the bathroom (anytime I moved or the baby moved I had to go), and generally was not a happy woman.
I also was getting grossed out by the taste of coffee, so even getting down one cup was a chore. I am not a pretty sight without at least one cup of coffee, preferably a lot more than that. Me + 9 months pregnant + no sleep + 2 little boys at home + almost no coffee = LOOK OUT.
I went in to the hospital once, about a week and a few days before my due date, with slightly irregular contractions that had woken me at 3 a.m. and persisted all day. Nothing happening. At that point I said I wasn't going to waste my time going in until I thought I was ready to push him out. I also said I thought he'd stay in there forever and just be reabsorbed into my body. I was getting kinda nasty. Actually, when I went in last Friday, I was having very irregular contractions (some five minutes apart, some thirteen minutes apart, all over the place) but they were getting stronger. The admitting nurse took my information and later told me that she said to another nurse "she couldn't be less in labor if she weren't pregnant." Turns out I was almost 5 cm and pushed my 10-pound, 22 inch little boy out in 4 minutes, less than seven hours after being admitted.
Whine away on here, I did, and I think it helped. At least we can step back and KNOW how cranky we are, even if it feels like we can't help it! :)