Welcome Adalina Marie!
Sorry to hear about the rough start nursing! It WILL get better. A LC at my hospital recommended putting tea bags on my nipples when they were sore. We steeped them in nice and warm water, wrung them out a little and put them on with a breast pad. Don't ask me why, but it really worked! I did that a few times and also used lanolin for a few days. Hope you get some help from the new LC>