Feeding issues with 10 week old

Hi mummies, my 10 week old has started to reject milk - breastmilk and formula milk fed through the bottle. When he is hungry, he sucks his hand and refuses to drink milk. As a result, his milk intake has dropped significantly. Every feed is a nightmare - he will cry alot and take 20min to drink 10ml. Anyone faced this before? Really need advice urgently! #advicepls