I have had irregular periods, and have missed a periods twice for
each. Now I have not had a period for
almost 6 months
. I have asked my sisters, and they both had irregular periods untill they were in their mid twenties, and have missed for 6 months as well. I eat a healthy diet, do not over exercise,am not excesivly stessed, and cannot be pregnant. What could be wrong? Is this normal? Should I tell my doctor?