Hi I'm almost 18 years old and I was just wondering if somebody could help me figure out what is happening. It is now June 8 and I was suppose to get my period on June 4. I have always had a normal flow and now out of nowhere I missed my period. Lately I have had a weird taste in my mouth, sore nipples, crampy on and off stomach, I feel queezy throughout the day, it is uncomfortable to wear tight cloths like I used to be able to and lastly I find it uncomfortable to sleep any other way besides on my back at night. I took a home pregnancy test yesterday afternoon. It came up with a very light negative sign. I just don't know what could be happening because I have never been late before. Please help me.