It's a little easier to meditate while high, haven't tried it for a while. Haven't meditated in a while in general. I might recommend meditating on salvia if I didn't almost always have bad trips on it.
EDIT:Just relax man, try to let go from the stress of the day to keep your mind from racing about it. Cannabis should help with this, I know it makes some peoples minds race and others stop racing but I know it makes everyone relaxed.