I have my period every 28 days and it usually lasts for 5 days. This month I got it on the 6th and it only lasted 2 days, now 15 days after I have a full blown period and heavy cramping also clotting. I was scared I was pregnant so I took a test and it came back negative. I don't know what is going on. Any help.?

Many women have irregular cycles occasionally. This could be one of them.

Many women have irregular cycles occasionally. This could be one of them.

I hope so. I was also thinking maybe my body is changing I started when I was 9 and am 26 now so I don't know.

I hope so. I was also thinking maybe my body is changing I started when I was 9 and am 26 now so I dunno.
Hard to say, but bloodwork will give your doctor a place to start.