Ive just come on today (so fortunatly not working) its a very heavy one feel washed out, havnt had a period since april as the depot prevera injection stopped that!  I  do think suzyblue's  idea might work well for me next time i get caught like this unexpectedly if on tour or something 

I've had no end of problems with my periods ever since I first started.  I've tried all manner of contraceptives etc. to stop them over the years, but nothing has worked and in the end I just put up with them.
Since starting in this business they've cost me as I've never been regular and I can sometimes come on twice in a month, so I've had to do something about it.    I'm currently on the depo (but I still get periods, although they are lighter now and I don't suffer with period pains anymore), until I have my womb cauterised.  Hopefully then that will be an end to the problem.