New to breastfeeding

I’m currently breastfeeding my almost 7 week old daughter and I have lots of questions. Does it ever stop hurting? Only my right nipple hurts, but it hurts bad! Does brewers yeast help milk production or is it more like fenugreek where it helps some and hurts the supply of others? If it helps, how many milligrams should I take? What about sunflower lecithin to help avoid clogs? Does it work? If so, how much should I take? Any other advice would be appreciated as well. I was unable to breastfeed my first baby so I’m completely new to this but I want it to work out soooooo bad! TIA!