My suggestion to you is that you consult an ENT specialist
asap as most of the "feeling motion" episodes are due to the involvement of the labrynthine system in your ear. vertigo
is a very vast symptom so it is exactly hard to tell you exactly what is going on. If you can give more details maybe we can get closer to a diagnosis, but you will need to run a few tests. please do tell me your age, gender and more details about the motion. Do you see objects around you moving or you get the feeling that you are moving? is the movement in circles or verticle?
Take good care of your self