My period was darker than usual, and the bleeding only lasted two days. My breasts usually get sore about a week before and they did but they don't hurt anymore and I have read that almost everyone has very sore breasts during the first part of pregnancy, could I still be pregnant or is it more likely just an off period?

Deffinetly get tested. I have four kids. All four times my last period only lasted for a day or two.very light. Every pregnancy is different. Not everyone feels the tenderness. I did only in two of my pregnancies. Increase of tiredness and loss of wieght during in the first three months.