33 weeks pregnant with a little blood?

I was using the bathroom and when I was wiping there was some red blood. Not a whole lot just a little. I wiped about 3 times till it stopped. But like I said it wasn't a lot. Just a little. Like red smears (sorry tmi) But it wasn't brown or pink it was red. Has his happens to anyone? Or does anyone know what could be wrong or what I should do? I think I should wait and see if there's more. Baby's still moving around I feel him. But just a little concerned about the blood. Thanks! =)