SPINNING OUT?

Ok so iv ben using the aneros syn and the aneros eupho trident models for the past four weeks and not getting much result. Last night i tried a different approach and decided i would try and meditate while using the eupho. As i was concentrating i did notice that what i was feeling was subtle but good. In that deep relaxed state i was in i suddenly got the sense i was floating on a cloud and didn’t feel like i was grounded. And that’s when the spinning sensation started. It was very violent feeling and kinda scary. It felt lile my body was rapidly spinning backwards through the air changing directions and constantly falling. I thought i was gonna have a brain anurysm or something and stopped feeling a little nausiated. I was wondering if anyone else has had this experience? Is this a normal to exoerience on the journey?