2day period?

I got my period the 8th which was Tuesday. And it was pretty light to begin with ,second day with was on Wednesday it was normal, it wasn’t to heavy , and today Thursday I had brown spotting and then it just completely stopped , never has that happened to me I usually have my period 3-4 days and some what heavy , I’ve felt completely off these few days as well it might just be me over thinking it but it has never happened to me , last month I did have unprotected sex a couple of times. But could i be pregnant? Or is this normal?

Has anyone else ever had this happen to them and it be normal?

Or has anyone had this happen and turn out pregnant ... should I be worried 🙄??