When I turned thirteen I got my period normally up until I was about 15. Ever since then, I haven't gotten one (I am almost 19 now). When I went to the doctor, they did blood tests and they said that everything was fine and that I was just irregular. About 2 months ago I started taking 50mgs of zinc daily, because I heard that it can clear up skin. As a result, I have gained almost 10 lbs and now I get a regular period. Is this common? Can zinc cause women to get their period? Any help would be appreciated.