I'm seeing a girl right now who I'm pretty sure likes me,
but she spent all day yesterday with some other dude and I don't trust it.
I met her up LATE last night (after calling and calling and finally getting
through and then more delays) and she was suddenly reallly sick.
do I smell bullshit?
so basically I spent half the day kinda waiting around for her,
and then she delay delays and then i see her for like 10 minutes not even.

she told me to call her today and I did a few times and the phone answered once and I could hear her at work
so I went to her work. she wasn't there. came home, called her, no pick up, tried a couple more times, no pick up

When we met we didn't know this but it turns out I've known this girl for a long long time, like since we were kids, and she tells me shes glad to know me again.

I should probably just freeze her out (which I probably will do) but I feel kinda schmudged by this whole thing. Am I over reacting? Probably but I've always believed in trusting my gut feelings. and I think they're fucking. bastard. they probably aren't though. but they probably are. GSAHHH

yea I guess I just won't call her for a good while. But then what if this other guy just comes in there and then when i do call its too late because he's taken over? fuck me i need a drink.

Sounds like a bad case of oneitice. If you call once and she dosn't pick up, leave a message or don't and send her a text instead. But never call over and over! It makes you sound/look way to needy.
I suggest you do this, forget about her, accept that she is or may be with this dude and move on.
Sorry if it hurts but forget the freeze out too. Just forget her, maybe she will call and if she does act like you forgot about her. Because you were so busy with your life and all the girls in it.