So weird

Ok so AF came yesterday (on time) and was moderate with moderate cramps. Then before I went to bed it was light. Now this morning it is still light (enough to wear a light tampon) and I have light cramps. Usually my period starts off light to moderate on day one, then moderate to heavy on day two, then light to nothing on day three, and then usually mod on day four to light on day five then brown spotting. Its almost like its the opposite this time cause I had light brown spotting before AF came. Could I be preg?