Milk on its own will not help significantly unless you get at least 5000 IU's of vitamin D a day. The RDA is only 400 IU, only about 1/100th of a milligram. In an hour out in the sun you produce 50,000 IU's depending on how much skin is exposed. So I would recommend intaking 5000 IU a day (minimum) supplemental which is about 12 tiny capsules of cod liver oil. However there are other supplements if you look hard enough that sell 1000 IU and up in each tablet. So I would look for those and buy it. It's also very important to get in the sun for the purposes of helping the milk work by synthesizing vitamin D in the skin. But you can't find any calcium product that is better absorbed than milk on the market, unless you're lucky enough to find a high quality coral supplement.
I repeat, just drinking milk won't help unless you get a lot of vitamin D too. Also I would recommend drinking milk for say a month at two glasses or so per day. Because the lactose in the milk will also help build up your good intestinal bacteria. Some symptoms can get worse before they get better. I think you'll be suprised how effective this procedure is. :)