Questions!!help!

My lmp was 12-9-14. I tested in feb and it came back neg. I've never gone more that 6 weeks with a missed period, so it's a little nerve wrecking. The only s/s are breast tenderness, since like jan, I did however have lower back pain, my hip felt like it would pop when I would get out of bed. Now, I have cramping like sensations that will move from right to left and sometimes be in the middle. I've felt like butterfly sensations in my tummy, but I presumed it was gas from all this bloating. About 2 weeks ago my indigestion stopped. I'm just so confused on what to do or think here. I'm 23 yrs old. HELP!