hi I took a pregnancy test last week said I wasn't pregnant but after that ex specially this week I've been feeling really sick, light headed, bad head ache, bad back ache my nipples hurt, and veins are showing on them also my tummy is very sore and feels like something is pushing around inside, I just yesterday started bleeding, but not like my normal period it's just a little bit I'm bleeding a bit today but not much at all, do you think I could be possibly pregnant?