I think it's time to buy new jammies.
Yoga style pants and t-shirt (usually sleeveless, sometimes long sleeve) when I'm cold, I add my "fat" hoodie from when I was preggers with #4.
Looking at getting new jammies too. ;-)
I usually sleep in yoga pants and t-shirt (those basic v-neck ones you can buy at Target). I want some "real" pajamas though!
I didn't even think of gowns. Wow, doesn't that sound so old fashioned, "gowns". Are gowns still being made? :) I haven't worn one in ages, but I do remember they weren't very comfortable because they would ride up my legs and eventually get twisted up in the sheets.