Funny fizzy feeling

Hi ladies, been TTC baby number 2 for a year, and not having much luck.

Had a funny feeling today (8DPO) - only way I can describe it is like a teeny tiny bath bomb going off right in the centre of my womb?! 😂 Like it started like a tiny ball of sensation bubbling and fizzing outwards? Lasted about 30 seconds and went away. But it made me stop in my tracks it felt so weird. Never experienced anything like this before, has anyone else ever had similar?