HELP! *Breastfeeding*

I wasn't able to breastfeed my daughter because I didn't produce enough milk and didn't even come in at all until 2 weeks after she was born. I'm 17 weeks pregnant now with my second, and OTHER THAN OATMEAL (it makes me sick!!) What are some thing I can do or eat or drink or whatever to help increase my milk supply? I really wanna breastfeed this time!!!