To sleep, perchance, to..... sleep?

Ok so my sweet little bear has never been a good sleeper. Not since the second week after she was born has she been restful. She didn't sleep through the night until she was about 14 months old and still doesn't about 70% of the time. Normally (at almost 21 months) she wakes up about once a night, in the middle of the night usually, and falls back asleep within anywhere from minutes to 2 or 3 hours. She didn't start taking naps that lasted more than 30min until almost a year old. So yesterday, when she took a 2+ hour nap, my suspicions were immediately raised. I said to my husband yesterday: "she took a long nap today, something is up. Either she is going to get more teeth or she is going to get sick." You see, I am pretty sure when she does that (takes a long nap) it is because she is getting ready for a marathon of sleeplessness, usually because she is either sick or teething. Teething, especially, has been excruciatingly slow and painful for her. :( My husband simply laughed at me and said something like: "you mean she sleeps really good right before she doesn't sleep?"
Ha. Ha. very funny.
Last night she didn't sleep for more than 2 hours at a stretch (in fact 2 hours is a stretch...) Somebody say a prayer for me. And for little bear too.
I think I might go and read Simcha's post on the 5 stages of exhaustion again.