I had my period 2x last month after 18th of May which was the last day of my period then I had brown discharges last 28th of May in the morning then few hours turned pinkish with blood clots then brown again on the 3rd and fourth day and so it stopped I was taking irregular pills that time.but I do also before but never experienced anything like this.this is the 1st time.can I possibly be pregnant and how soon can I take a pregnancy test?

These don't sound like signs of pregnancy to me, but you could test in about two weeks to be sure.

You might want to consider seeing a doctor about your symptoms. That's not typical for a cycle and the pills are probably to blame.