I finished my period on the 24th Dec 2016 and still haven't come on my period. I usually have a regular period every 4/5 weeks. I have become really bloated and been suffering with stomach cramps like I am coming on my period but I'm not and these light cramps have been going on for a couple of weeks on and off. I also needing the urinate a lot and had a strange metal taste in my mouth a week ago. I have taken two pregnancy tests and both were negative. I'm 21 and have no children and have never been pregnant. I haven't been on any contraception for around a year. Just looking for some advice about what could be happening as this isn't normal for me