I started my cycle april 6 2012 i have been giving two due dates jan 22 and jan 17 2012 when could i conceived i also might have spotted in april.

No 2 due dates: Clarify with your OB which due date is your final due date first. Once you have your first ultrasound, your provider should determine what will be your final due date. Subsequent ultrasounds are then used, not to change the date, but to look at growth rates. Once your provider clarifies your final edd, then your question can be answered.