Help!! Teething monster...

Well, our visit with cousins has come to an end, and I'll post more on that later, but for now, I need help from out there in Blogland. Seth is teething. I'm pretty positive about this. I feel a couple of little teeth coming through up top, he had a slight fever yesterday, and he's drooling up a storm and chewing on his shirt...a lot. The worst part of this is that my perfect little sleeper is long gone. Two nights ago, he woke up 3 times before morning. He normally wakes up once, if at all. I fed him in order to keep him from waking everyone else in the house, including the two sleeping little girls. Last night, he woke up twice, and I fed him one of those times. We gave him some baby Motrin the second time he woke, not realizing we shouldn't, so now he has a few little red spots on his face. Back to the baby Tylenol... Anyway, that did seem to help some. Hyland's Teething Tablets have not done any good so far. Today, he slept for 30 minutes of his afternoon nap before waking up screaming. David's walking him around the block now. His naps for the past few days have definitely been shorter than normal. I'm hoping maybe some of this craziness has to do with the fact that he's been sleeping in our room because there have been 4 adults and 3 kids under 5 in our house for a week. But what do I do when he doesn't nap well or sleep well at night? Should I make him lie there for the normal time like I would do if he wasn't in pain? Do I feed him whenever he wakes up at night? By the way, he also seems a little more hungry than normal the past couple of days. Is that caused by teething, too? Anyway, I need advice... Anybody got any ideas on what to do? How long is this going to last? It's been too long already....