Fluttering/spasms in tummy at 5-6wks?

D • 30, UK 🇬🇧 Mama to a 34 week preemie 💙

Early this morning I woke up with what I can only describe as a fast fluttering sensation in my lower tummy area. It wasn’t painful at all it just felt strange and like something was moving! I’m nearly 6 weeks so obviously way too early to feel baby move, but what could this be!?