geez.. its personal choice. If she wants to go through ramzan without missing a roza, thats her choice.. why the need for condemning?
b/w stopping ur periods during ramzan is prob more of a naiki than stopping it for a wedding..
in regards to the dark spots, yeah, thats kinda confusing.. i remember Farhat Hashmi saying something bout it.. something to do with everybody's bodies being different.. plus i hear with pills, you do get the odd spottings.. maybe thats all it is.. its not really your period..
Depending on the type of pill you're on, you can take two packets back to back without a break to avoid getting your period eg if you're going on holiday or Umrah. But you should consult your doctor first and the method isn't foolproof either as you run the risk of breakthrough bleeding which is what it sounds like you're experiencing already.