I had unprotected sex with my bf on the 2 sep in the early hours of the morning and he ejaculated inside me. I took postinor 2 SD the same afternoon. On the 6 sep I began spotting blood and it pained while I urinated. My period came on the 9 sep and lasted until the 13 sep. My period came even though it came on the 24 aug. The burning while urinating has never stopped though.
Is this still an effect from the tablet? I am very worried. The burning is the worst on mornings when I awake after not urinating all night.

NB: it is the single dose Postinor 2 tablet that I took.
Please help.