Ok, so I think you've gotten a lot of really good advice...definitely make sure your horn is large enough...check the suction..I always used it on the lowest setting...and if you're not completely happy with Lanolin ( I always thought Lanolin was too hard to spread and caused more pain than it was worth) I would try using Olive Oil. That is what my lactation consultant recommended and I always used it for sore nipples. You don't have to wash it off and it goes on real easy...cheap too.
Also, I'm not sure why you don't want to be told to nurse...because of the sore nipples? I nursed all four of my children and sometimes it was very painful, but I can say that if you are thinking he is not getting enough, the common solution is to nurse more often to produce more milk, and of course to be sure you are drinking enough water. I personally always found nursing less painful than pumping.
I'm not judging here at all, but I've had a little bit of experience with this, and I have to say that they set you up for failure by giving him formula in the hospital. That low blow sugar problem is just an excuse for them to sabotage you (whether they saw it like that or not, which I'm sure they didn't)...it doesn't require formula...your body makes everything your baby needs. I know you are doing what seems like it is best, and it is not your fault, but I would be pretty miffed at the hospital staff who didn't support your choice of breastfeeding 100%. And if they had no reason to delay bringing him to you for 4 hours, shame on them! Never doubt your ability to provide adequate nutrition for your baby...your body is designed to provide for him.
When I read your post it really made me mad at the hospital...never in judgment of you!! I never thought I would become some Psycho saying you should only nurse mom, but after nursing 4 children through cracked and bleeding nipples, a 40 minute nurser, mastitis, thrush, clogged ducts, biting, you name it, I firmly believe that if I can do it, any mom can be an exclusive nurser!!
If you are happy with using formula, that is great, but if you are ever doubting your abilities to provide all that your baby needs, please don't doubt yourself. You are an amazing mom to be asking this question and not just throwing in the towel. And anyone who has ever pumped knows what a pain it is, so I really commend you for all that you are doing. Sounds like you are putting your baby first, which is what we all should do. Good for you.
D.