Movements in early pregnancy??

Hey Ladies, I have a question.

So, I know typically you won’t feel flutters around 18-20 weeks, the earliest about 13 weeks. So here is my question, I’m 9 weeks with twins of course, and sometimes I feel what appears to be like flutters. Big ones. I mean enough to make me jump and react. I first felt it at like 6 weeks or so, (TMI, but like when I was using the bathroom one time, I felt it and it made me drop the toilet paper.) I felt it when I was rubbing Bio Oil on my belly, and it’s just sporadically. I even feel it sometimes, when I’m laying down on the couch and when I get up the wrong way, it’s shocks me that I feel it. Is this normal? My husband is concerned and says he’s never seen a woman react that way. Now, again I have felt this before and I have had 2 US thus far, and my babies are fine. I will ask my Doctor just so he is not worried, I just want to know if anyone else has felt this early in their pregnancy?

Thank you in advance!