Hi My GF got periods after 6 days of sex.we had sex without any protection and i have just lost sperm.I dont know i left sperm in her vagina but i pulled down my penis that time and left the sperm out side of vagina and i also given her one contraception pill (I-Pill) after 10 hours so my question is why she is getting periods now.
She may have been close to her period and it naturally came six days after you started.
You also need to know that morning-after pills are loaded with hormones and can and do cause periods to occur... that's how they prevent implantation and development of a fetus.
You REALLY need to speak to a health professional or nurse about birth control. You are attempting to manage things without understanding the basics.
Go get educated. And they will tell you of the need to use protection every time, instead of emergency controception after the fact!