Sometimes i feel pregnant...like kicking in my stomach i've had 1 child, i get checked and im not is it possible that i could have had a miscarriage?

Unlikely: Typically, a pregnant woman cannot feel her fetus moving until she is 18-20 weeks pregnant. It is very unlikely you would have been that far along and not noticed you were pregnant and had a miscarriage. The movement inside your abdomen is most likely due to your intestines digesting food.

Aortic pulsation: You may be feeling the pulsation of your abdominal aorta, especially if you're of lean build.