Confused and tired

I'm getting so frustrated, it's not even funny. I can't remember most conversations that I've had 5 minutes ago. I went to church this morning and I couldn't tell you half the things Pastor Dan was saying, and trust me, I listen during church. I can't remember who I tell things to. KRay has to explain to me how to grade her papers, which isn't me at all. I went the wrong way to go to my grandparents' house (well it awasn't the wrong way, but it wasn't the normal way I go...I went the way we used to). I forget which pictures I've saved and which ones I haven't. I forget where I place things, which I know a lot of people do, but I mean, COME ON really? I'M JUST NOT MYSELF! Some of my friends keep telling me that I'm acting different, not in a bad way or anything, but in a way that's not me. My grandma keeps on telling me it's my sinuses, but I don't think so because that's never happened before. I pass out Tuesday night and don't remember the last 2 hours. Something's wrong and I want to know what. This isn't me at all. Everyone kept on telling me on Wednesday that it'll all get better in a day or two and that I'd start remembering things, but it's almost been a week now and I can't be patient any longer. I want to remember now. I just pray that God will help me and just keep me strong. I pray that I'll start remembering things and just become myself again. I just pray really hard.