Negative test but no period

Okay so I am late for my period I was supposed to get it the 5th I took a pregnancy test about the 7-9 of November and it came back negative was it to early or am I not pregnant? My boobs have been swollen and sore and I've been more tired and today I felt sick I just didn't want to eat and have had some cramps around the lower part or my belly and it's a little swollen and my jeans are getting tighter I don't know what wrong could I be pregnant or what is it? I'm only 16 and just really confused no rude comments or anything please Id just like to know!