Lighter periods than usual. Marriage?

I used to get my periods regularly. Last time suddenly they got delayed. My gynacologist prescribed Sysron 10 mg tablets for 10 days and on the 15 th day I got my periods. They were lighter than usual (i had bleeding only on the first day). For this cycle my gynacologist prescribed Meprate tablet from the 18th day. This time I got it on the 27th day. The bleeding is better than last time (It lasted wholly for a day and a half) yet not what I usually get (whole 2 and a half days). Is this normal? I am 31 and am planning to get married. Will this be any cause of concern relating to my fertility after marriage? My hb level before last period was 9.2 mg and before this period it is 11.5 mg. I am also taking iron supplements prescribed by my doctor.