Sounds to me your snake is doing just fineas long as she's eating and acting normally she is A-okay. And don't worry about the lack of poop. Sometimes snakes will hold their poop for a while, she will leave a big ole' stinky present for you soon enough.
Oh and stargazing is just when they stare straight up for a long time like they are gazing at the stars. But yeah lack of poo is definitely not a sign of IBD. If it were almost everyone's snake would have it lol.