In June, July and August I had light to moderate periods then it stopped in September, October and November then in December I got my period for 5 days and now I don't have it. I've gotten blood tested for hormonal imbalance and pregnancy but they all came out negative. The doctor doesn't know what is wrong with me and I feel slightly worried. I get a sharp pain in my breasts that go away in 10 seconds and I get random cramps and my vagina feels like it's opening every now and then, sometimes my back hurts but I'm not sure what it is. I'm wondering if anyone has experienced what I have experienced?