Good luck. No one can tell you if you are having a girl until you are about 20 weeks pregnant and have an ultrasound. The baby's sex organs have not even formed yet, til a little bit later. You can try online some sites will give you more info. On how you can tell. But they are not always accurate, it is just for fun. Only an ultrasound is about 80 percent accurate when you are about 20 weeks along. A lot of the sites on the internet ask for your pregnancy symptoms too, and you probably wont have too many of them for another week or so, etc. There are also test you can buy. But I have heard of them being wrong to. Good luck though and congrats. I know it is hard to wait, but either way if it is a boy/girl you will love the child, you are blessed. Congrats!
Here is an old wives tale, if you keep your waist line during the pregnancy, it will be a girl, and if you get wide in the waist line, then it will be a boy. I followed that during all 4 of mine, it worked, but I still can't say that it is fail proof. Hope this helps you out, congrats to you ma'am!