Hello i am having some problems that i am not sure what is going on i have been having some strange menstrual cycles in the month of may i had my period twice ?

Many reasons: there is many eason that affect woman cycles. cycles is a reflection of the woman hormones, anything that affect that will afect the cycles, from medication, to illness like viral illness or URI, or even GI disturbance or a simple fever.the most important factor is stress, you are too young for the changes,so ifthe cycles keep changing month afer month go and see your GYN. good luck