I understand. both my nipples were inverted, and my first son was a very strong sucker. i thought i was going to die.i cried everytime i nursed him , for about a month.i was so determined to do this the right way. everyone kept telling me it was ok to give him a bottle.I never once gave him formula.And i nursed him for almost 2 years, and i am now nursing my second son, pain free. my sister in law just had a baby and has not had any pain or problems. and probubly won't nurse for very long, not determined enough. I don't know if it's genetic. but it kinda makes me upst to see women who have no problems and give up so easily.it's not fair. But i am proud of myself for sticking through it. and you will be to.