Weird kicking feeling.

I have been feeling this weird kicking sensation in my abdomen for about 4 months now. Now I'm not pregnant! I have a regular cycle and have taken multiple test of all brands. I have never been pregnant but when I look at my stomachs when I feel those flutters it looks like a baby kicking. Its just weird...I've googled it to see if anyone else had the same sensation but they have all had children before...it doesn't hurt when it happens just sort of makes me jump. Just random movement...any help?