Pregnant?

Ok so I had my “period” a few days ago but it was extremely dark almost a brown and extremely light I could wear a regular tampon all day and take it out and hardly anything was on it. I’ve had some pregnancy scares but never have had a strange period. I’m normally super heavy and a very red color. My boobs always get sore a week before my period and the time being and then they go back... but they are still super sore. Am I just being paranoid?