weird period

Co
I last got my period in late November. It missed October completely. Late October was my birthday, so I spent two weeks with my lover.
It came back Nov 18. It came back painless (I'm used to a ten out of ten Pain), light (also not normal until a few days in) and old blood in a brownish.
It's now been a week and my periods only usually go on for five days. 
I took a test a few days before I noticed I was wiping the light discharge. 
Should I be worried that it's abnormal on so many levels?