Hi im 20 years old an myself and my husband decided to begin trying to conceive right away. I've had problems before and been told i suffer from endemetriosis. I started my periods in primary school, and right through i really suffered. sometimes i bled constantly for up to three weeks. i was put on various different pills and had an implant fitted in my arm to control this but nothing worked. i eventually said no more. no more mood swing or side effects and thankfully one year on my periods have settled down dramatically and i often don't feel much pain at all. I was wondering however would being on any of these affect my fertility. at the minute my period is late and i've felt very pregnant for first time since we've been trying. i feel so elated then i took a test on the day after my period was due but it was negative. my period still isn't here. could the test be wrong? help.. my emotions are taking a rollercoaster ride through this- i just want some certainty.