Could body aches be a sign of early pregnancy?

AF is due in 5 days and we've been TTC for 3 months by tracking ovulation. I very rarely get headaches or sick in general and for 2 days now have had constant head aches and back aches as well as just general joint aches. Almost feels like the aches you get with the flu but no other flu like symptoms.. I've never heard of aching being a sign of early pregnancy.. anyone else ever experience this??? I'm trying to be hopeful this month!