Hi doctor . I am 29 yr old,married for about 2 yr,having no children,had an early miscarriage in January. For a yr, I m having a problem of light brown spotting after 8-10th day of my periods. It remains for 2-3 days. My cycle is irregular(of 35-42 days). How can I know about my fertile period when I can try for a baby? Plz help.