I've gone raw for the first time and now my period is off. It used to last a full 7 days of regular bleeding. Now the first two days are regular the third day it comes and goes and the 4th it almost seems as if its gone. It has been like this for two months in a row. I had my period ever since i was 12 and im 17 now and i think it should always be normal by now. I got a pregnancy test and it came out negative. What is up? Should I test again?