I didn't come up with my periods.It is almost 5 weeks. My UPT stands positive today. But 2 weeks back it was negative.Could u please tell what could have happened? We never had unprotected sex in last 2 weeks. My last periods was too longer, and had medication from my doctor when it was 17th day of bleeding. Now i don't wish for pregnancy as I'm a lactating mother. Is there anything that could be done at home??