I'm 15 weeks, I have a strange ?

It's possible, but not likely. The only time a twin isn't picked up on ultrasound is when it's hiding directly behind the other baby. You wouldn't be likely to feel movements in two completely different places if that's what happened.

I felt lots of movement in too many directions at once with Vivienne. I was convinced I was having twins, even though the ultrasound only showed one baby. But, I really only had one very active baby.