me and my husband have been trying to conceive for 9 months now... I have had 2 successful births and 1 miscarriage with my oldest I didn't have any symptoms just knew I was pregnant and with my youngest I had all the symptoms but now im having nasea, throwing up, constipation, migraines, back cramps, also my periods are always the same 30 days apart and lasts 3 days have always been that way and now they are coming sooner and dont last but a day and two weeks ago i had really bad cramping and light bleeding but just figured it was my period starting becuase I never experienced implantion cramps or bleeding with my boys I didnt think anything of it til a friend said something but I have taken two tests both neg my period is suppose to start in like 5 days what is going on?