So. Now I know. For certain. I kept trying to tell myself that I was imagining the critter sounds in my attic. Two people looked up there, and I looked up there--no sign of anything.
And then tonight, I hear scratching again. This time, though, not in my attic. This time it was in the ceiling of my living room, which is vaulted (i.e., there is no attic space). At first I thought, SCORE! This proves that the sounds I hear are critters on my roof, not in my attic. Awesome! So I confidently took my big flashlight and went to my deck to gaze upon the bastards running around on my roof. But alas, there was nothing. So then I optimistically thought that it was just that I scared them off. So I went back inside to verify, only to hear more scratching sounds. I gave it one more go, looking on the roof...but there was nothing.
So, what that means is that I definitely have something living in my walls/ceiling. On the upside, now I know I'm not crazy. On the downside, I have something living in my walls/ceiling. I think the downside trumps the upside.
I have no idea what to do next. Two people have looked around and found nothing...no access point possibilities. There is also the fact that I share attic space with the neighbors, whom I don't know. Do I go ask them if they're hearing things? Will they think I'm crazy, filthy? If the pest control people come, and the access point is on their side, will they pay for it to be fixed? What the crap am I supposed to do???
I hate owning a home. I hate it.