My clutch has been grabbing at different places on a random basis. Now today sometimes when I push the clutch all the way in it doesn't disengage. Sometimes the clutch grabs way at the bottom by the floor but most of the time it grabs around the top like normal. Also sometimes when I start out in 1st gear the car will shake really bad while the clutch is being engaged. I checked the fluid and it seems to be normal. Please help with any info you might have.