What Causes Irregular Periods With Reddish White Discharge?

Hello Doctor,
I got married on 15th July 2010, But still i dint get pregnant, i am having irregular periods, and even i have thyroid......i took tablet for irregular period, after taking tablet for two months my period came properly, but this month i dint get my period properly... last month Feb 4th 2011 i got my period after that March 3rd 2011 i got reddish white discharge, after that it stopped again reddish white discharge came on 10th & 13th March 2011....... i am pregnant.... please reply for my question