I know this is prob a silly question to some people... but I was wondering.. I'm 39 weeks pregnant now and I haven't gained a pound in a week. Now does this mean that the baby is gainning all the weight and if so how much roughly a week? Because I have been eating like crazy and not the good of foods sometimes. I don't want to have a chunky fat baby cause I'd feel bad that I made him fat. :( Can this happen??

Your baby will probably only get under 10 lbs of it. I don't know many babies over 10 lbs. Then some goes to the water and other things like the cord.
Then the rest is pretty much yours to keep.

In the last several weeks, weight gain for baby is roughly a half pound a week. Keep in mind it is a rough guide.

You won't make baby unusually large by what you eat... there are slight exceptions but that has more to do with women with diabetes and glucose control for example.

Plenty of women gain 60 pounds and have a 7 or 8 pound baby. Other women will gain 35 pounds, and have a baby that weighs 9 pounds.

As NOhelp4u said, not too many babies are larger than 10 pounds and often that will have to do with genetics, which you have no control over, or health concerns in the mother, again as can sometimes be seen with unstable glucose levels.