my bbt very accurately follows the temperature in the room if it's not constant. (It seems to be more sensitive after ovulation too)
Yesterday it was comfortable, abiet warm in our room while I was in bed. Today, cold as heck. Yesterday's temp very high, today's temp, just above coverline. I sleep better when it's really cold, so I cranked the a/c today after dh went to work... I guess I should have just slept fitfully, my chart would look more normal (my temp was 97.8 when he went to work at 5, and was 97.4 when I got up with my alarm, and I slept from 6 to alarm almost 4hrs with out budging).
Going to follow my cm for a few days. It has been VERY generous this month, easier to read by far (I'm guessing it's from giving up the spermicide) but it's just not reflecting my temperature. I'm curious to see if it stays dried up for a few more days.