Those are 2 different things ya did at the same time though, so your response can't be attributed solely to Mesentery painting. (Drat, lol!)
Hanna mentions the Bladder meridian, and it's possible that since the bladder and the vagina are adjacent, your response could have been the result of the suppository and not MP.
I am sure the suppository made a good difference for you- It would be nice to know which thing resulted from what action.
I and others have also gotten the crusty-eye response just from Mesentery painting, though :).