i have irregular periods,my periods falls between 1 to 3 months i guess.my last periods were on nov 14th and dec 18th,.recently i got married in novemberand we had our intercourse on jan 6th,till now and i didnt get my periods and i went for a scan and urine preg test,.both showed negative,and my doc adviced me to take sysron 10 mg for 3 days.what should i do my conceptiopn?when should i have my intercouse.?how can i know my ovulution days?