My Jan period is 16 to 20 jan!!! As for Feb period is on 10 to 14 feb!! I have sex on 17,24,26,28,29 feb and 3,5,6,8,17 march also but Today my period is here on 18 march and my period cycle is always different every month so when should I have sex to have baby!!!! Help!!! I am 30 yrs old and have 2 kids already!!! Not on any medication of control birth!!! But 6 yrs no sex but now thinking to have a baby again so pls help me!!!!