Frequent Convulsions?

I have a burning question about what's going on with my body, any insight would be very much appreciated. I suffer from frequent convulsions throughout the day, while they are not long lasting, they are violent. They are similar to typical "cold chills" but much more violent with very sporadic movements. My shoulders and arms fly out and contract sometimes like they aren't part of my body, and usually feel like I'm pulled heavily to one side and forward. They have been rough enough to throw me onto the floor from a sitting position, and they tend to be localized in my upper body and occasionally my right leg. I have never lost full consciousness, but every once in a while I feel really dazed afterwards, and the the convulsions to my knowledge have never lasted more than what seems 2 full seconds. And I can typically feel them coming on a millisecond or two before it happens, almost like an aura. I know they are not cold chills, because I'm hardly ever cold, and it never happens when I am. I'm so confused, and this has only begun happening about 6 months ago. I range from 4 or 5 to upwards of 20 convulsions per day, and I would love to know what's going on. Any advice at all is appreciated. Thanks.