Your feelings are normal and I was that way too. I had my son on May 2nd and got my milk on May 6th. The first few days was colostrum and since my son was starving (and I was dead tired), I ended up breaking down and giving him formula. I still supplement with maybe 2 ounces of Similac once a day. Make sure from the time of your baby's birth that you're feeding him exclusively every 2-3 hours. Even if you choose to bottle feed with formula, make sure you're pumping every 2-3 hours (or when you can) as well. The more you do it, the more milk you will receive. Drink lots of fluids and eat well, and you will be fine. I didn't need the Mother's Milk tea, but definitely thought about it when my supply was small in the beginning. Be patient, have faith in yourself, and fight through the pain. As long as your little one latches on well, you'll get used to it fast. Good luck and use your lactation consultant or breastfeeding friends as resources!
That's a totally natural feeling but you won't know how much milk you will produce until after the baby is born. I wouldn't suggest drinking the teas or anything because you never know if that will induce labor or not.