I had my 37cycle last november (i had my period nov.23 then dec.29)then next 28days iof cycle from dec.29 and january 25.. and now i had my period again which is only 18days ago from my first day of last period.. iam so much worried.. i dont know if there is abnormality in me.. in the ryt tym i still wanted to have baby.. iam sexually active now...please help me..am i abnormal?