So, my periods are usually very regular. For the past 4 months, yes, four. I have not had my period, I have not had any spotting, and I have only had light cramps as though I am about to start but I never do. I have taken at home pregnancy tests , I have had a blood test, a urine test, and all negative. I haven't seemed to have any irregular symptoms such as ones you would get when you become pregnant, but I am not on any birth control and have no reason health wise not to have a period let alone for this long. My family doctor doesn't seem to be willing to look into it for me so what should I do from here?