Extreme pain in the right hand for speed

Good companions, well and wanted to take off the flight of the bumblebee so I decided that I did not have enough speed to play this song so I decided to look for exercises to increase my speed, well then after a few months practicing and practicing these exercises when returning to the song noticed that it was no longer complicated for me but as I spent my time doing these exercises and playing the song, I noticed an extreme pain in my right hand when I wanted to synchronize my speed in my left hand with my right hand with which I played the plectrum,
I have too much speed in the left hand of which my right hand can not continue and when I try to follow the same speed it hurts a lot, not hard nor 1 minute touching at this speed I think they are like 250 bpm in my left hand already with my right the top is like 190, and practiced and practiced for about a year all this flight of the bumblebee and the exercises, a mez I go up 3 bpm then 6 then 12 18 and so I go and nothing still hurts me I have been 1 year like this someone Do you know if I'm doing something wrong? because I move my doll like my whole life to play with the pua, but I was forced to use the full arm to move the pua thing which tires very little but I see that the precision decreases something else when I play on the bridge the hand does not it lasts for 10 seconds at this speed and without the hand on the bridge it lasts much more than with the hand on the bridge.
Does anyone know why this happens? those who manage to play at higher speeds or already dominate this speed, perhaps at the level they are already in, should be played differently? which was before being shered?