My supply dropped the first 2 times drastically, so much that I had to supplement right away. And was dry after the first 3 months completely. This time, I still have milk, but my supply dipped, and then stayed lower at 4 weeks, I supplemented b/c M was nursing 12 times a day, and was still cranky, but after I began to sup, I found that the food was not the reason, but my supply took a hit. He is still nursing 2-3 times a day, at 11+ months, but he also gets 2-3 4oz bottles.
I suggest making sure you keep up your water, I have the hardest time with water in the first 3 months