I think I need a personal manual

breastfeeding has been so hard for me and I feel clueless. I did a breastfeeding class and have seen a lactation consultant and I still feel like an idiot and I don't understand why it is still so painful and hard.

the lactation consult suggested I have shallow nipples. which is frustrating when I already have size DDD cups. she also suggested the baby may have a liptie. when I spoke to the pediatrician he suggested it's possible but most can grow out of it. I decided to try it another week and if things don't get better he can refer me to a dentist who can laser the liptie. I feel bad thinking about doing this to my child just for my comfort but it is so painful. the left is worse than the right and I try to help him latch exactly the way I've read and been shown. and still when hes finished my nipple is pinched (not round) and sometimes white not pink. idk what is causing that. is he biting? is it the liptie? is it too shallow? is he not sucking hard enough or too much? he is gaining weight so hes getting enough but the pain is so bad like pins and needles. should I try shields? I can't even figure out how to put them on correctly. I really dont want him getting used to the bottle and having nipple confusion or refuse the breast. but I really need to figure this out! I have some callouses but it is still painful. help a desperate momma out. I have no idea what to do from here.