I'm 23 years old virgin but after my 19th birthday, i don't have my period regularly, it happens like once in two months or the last time i didn't have my period for 4 months and i had to go to doctors and had pills for three month continuously. while i was taking the pills my period is normal and regular but now i'm not taking pills, I dun have my period. The doctor said this is normal for irregular period person. My question is "How can i check when is the safest time for me to have sex for a person like me?"