Pregnant?

So I have been having some signs of being pregnant, but have yet to take a test. I want to wait another week.
My last period was October 6.
Anyways, today my friend and I were doing heavy lifting, and when I put the heavy thing down, my stomach started hurting pretty bad. And I went to the rest room to pee and I was spotting. then it stopped. and I just started spotting again. Could I be pregnant?