Not sure what to do..

My son is recently 3 months old and the last few days there are some feedings where he refuses to latch. He will cry so hard and won’t calm down resulting in me giving up and feeding him from my pumped milk stash in a bottle. I’ve tried using a nipple shield, not using a shield, cradle hold, and football hold. It’s so frustrating and I am starting to feel defeated. I know it’s not the worst thing in the world but it’s never been an issue until now and I don’t know what’s going on.