I'm in my third trimester and keep waking up super-early - 3.30am this morning - and then not getting back to sleep at all for the rest of the night.
I wouldn't say there's anything in particular keeping me awake - no heartburn, discomfort etc - just my body thinking it's time to get up or something!
Maybe I should use the time to clean out the kitchen cupboards instead of being online...
Anyone else experienced sleep probs in their 3rd trimester?