Dizzy and Weak

I'm almost 9 weeks pregnant and the last few days I have been terribly tired and my body just doesn't feel right. I passed out at work the other day helping a customer. I've been feeling weak and light headed. Sometimes I get hot and my body feels really tingly. I can't sleep at night either. Is this normal? What can I do to fix this? Somebody help because I can't deal with feeling like this every day and continue to work the way I need to.