Hello, ive been feeling on my left abdomen like muscle spasms or fluttering sensa, under my belly button on the left side. no pain just it hasn't stop?

Likely muscle spasms: It's common for the abdominal muscles to develop spasms. This isn't anything dangerous but it can happen either from being too sedentary or even from excess exercise. I recommend doing some ab crunches and some core exercises. This should help it subside. If it doesn't change after a week contact one of us to discuss in more detail and to figure out the next step.