Pregnancy or what?

Abigail
So I've been having really bad headaches and nausea and fatigue. I'm on the shot, so I usually don't think anything of it. But today, when I used the bathroom, it looked like I was wiping up a little blood when I peed. Could I be pregnant or am I just sick? I haven't had my period in 11 months, so that's not a reliable source.