Can you tell?

Danielle TK
So my period hasn't really "started" like it usually does. It was supposed to have started on thurs. And I spotted but it was a darker color. Almost brownish. And now nothing for the past two days.
Can I possibly be pregnant, my bf and I have been trying and don't ever use protection. I just want to know what are earlier signs of a pregnacy. It's hard to get a real answer from searching on Google.