Spotting period or something else

I was supposed to start my menstrual the 23rd of this month I started spotting on the 19th 20th and 21st... Now Nothing..

The spotting was very very light I used tampons and The spotting was so light it barely made marks on the tampons... a few brown, red, pinkish areas but hardly anything... Im Confused is it my period that came early.. I had sore boobs a week or 2 before no other symptoms of pms.. Last month my period cramps were so bad it was almost unbearable. I haven't had that this month...

Any thoughts