Normal?

So I'm a 2nd time mom attempting to EBF.. but with my first I only lasted a couple weeks because he had a tongue tie and tore my nipples up within the first couple days. I really had no idea what I was doing and basically ended up giving up.

With this new little one who's now 4 days old.. things have been a lot smoother.. I'm focusing on getting deeper latches.. which is a little more difficult on my left boob because I have more of a flat nipple.. but it does pop out some we just have to re latch a couple times...

Anyway... my question is... is it normal to be pretty tender... like more of a muscle tender rather than tender from cracking? I've heard 2 opposite opinions about it... some say you shouldn't have ANY pain.. and some say tenderness is normal..

I ended up using my nipple sheilds with the last feed because I'm just sore...

Trying to be successful this time so any tips or tricks are much appreciated!!!