A.S.
The child nursing is the best and biggest sign to your body that you need more. So, try to encourage him to nurse more. I know at 2 months it seems like they are constantly feeding, especially when they process the milk so quickly, but that is what your body needs to make more. If you can get a little help around the house and take a few days where you just spend most of the day with some skin to skin cuddle time in bed with your baby and nurse every time he seems the slightest bit interested. Don't look at the clock or pay attention to the time. Drink alot of water, get proper nutrition. Dark beer and oatmeal do help as well.
There is also a supplement called fenugreek that is natural and is safe as long as you don't have blood sugar issues. You have to take quite a lot for it to work but usually once you notice an increase you can stop taking it. Here is info on it: http://www.kellymom.com/herbal/milksupply/fenugreek.html
You can get it at most natural food stores, some pharmacies and grocery stores. There are also teas with fenugreek and other herbs and tinctures. The teas aren't all that helpful because you have to get so much of the herb to make a difference, you'd have to be chugging the tea all day....but of course the liquids help. I haven't tried the tinctures but some people feel they help.
http://www.motherlove.com/product_more_milk_plus.php