Little Mini freak out

I think Im imagining things...but maybe not.

Last night I went to the bathroom and I had slight cramping but I didnt think much of it, thought it was maybe gas. All of a sudden while in the bathroom it felt like AF had come. The cramps were BAD and had me doubled over. Well, I did my business, still trying to convince myself it was gas, and when I wiped there was a little stripe of blood. Not pink, not brown, but red blood as though AF were here.
I almost cried and wiped again. Nothing.
I washed my hands and checked inside. Nada.

I cant figure out where in the hell it came from!
And, even weirder is it happened before. The day before I O'd. Except I was in the shower that time. I was washing, saw some blood on the sponge, freaked, and didnt see any more blood. And I had sudden cramps then too.

I dont know whats going on.
It cant be spotting, right? I mean, spotting doesnt make a sudden stripe of blood out of no where and leave nothing else right?
Im so freaked out.
I kind of want to post it on FF in General TTC or something, but Im kind of embarrassed to.
Someone please tell me this is normal and doesnt mean anything bad is going on!