You say it has happened before?
Have you ever posed that question to a Doctor?
It seems only to happen when you have your periods, that's a good thing if you think about it, have you "googled" the sympton?
I have to say after all this time here, I have never heard of this sweet.
I am not sure if you will therefore get many replies.
But, maybe advise us that this is the only time you have this problem.....
When you are on your periods and it sounds like it's recent, not that it's always been that case?