Hi I Had Sex With Condom On The 12th Of

Hi I had sex with condom on the 12th of August which was 7 days after my period. I took postinor on the 13th and the second tablet on the 14th. Then i started having brown blood discharge some days later. then sometime late August i started a period again (I cant remember the particular date) but I know it was late August. Ordinarily without the postinor 2 my period should have been on the 2nd of septemebr but it came earlier that was in August,
But my next period ought to have started atleast by the 25th or so but i am yet to see it. i just experienced some mucus like discharge which was light brown and then later cream coloured and i have had some cramps but no period. should i be worried?