I use to be like that all through my teens and 20's, Now that I am 36 it has slowed down. Maybe a few periods a year I get like that but mostly I just stay bloated.
I found that one type of birth control seems to keep the loose bowels from happening to me. I just switched back to Desogen which is what I took when I started BC for the first time ever. I just got off of Apri, but I took Alesse, Mircette, Ortho Tri-Cyclen, Ortho-Cyclen, and Microgestin. Also, I now have not had a migrain in over 5 months where I was getting them faithfully every month 2 days before my period and I was bed ridden for at least a day & 1/2 sp far the loose bowels seem to have stopped.
I start my period on Sunday and so far all is well. :)

Jenteal