I had sex on just after my period finished and the condom broke. There was no ejaculation. I took the emergancy pill 12hours later and experienced bleeding for few days from day 5 after the pill. My cycles are irregular. Last two were 35days long. Now i am on day 40 and i have pain in my lower back and stomach, i got period in the morning but its unusually light and pink/brown in colour. Is this normal or should I be concerned?