Is Spotting And Light Bleeding After Withdrawal Intercourse Normal?

Hi, may I answer your health queries right now ? Please type your query here...
my boyfriend ejaculated on the outside of my vagina on 5th day after my periods got over .. he immediately wiped it off .. but still as a precaution i took an i pill ... nw on 5th day after taking i pill there is spotting n light bleeding .. is there anything to worry about ??