Your breastmilk might have a higher lipase hence the smell. The smell part is normal as it wasn’t freezed after expressed, however you mentioned that it taste like vomit so I would advise to use it for milk bath/keepsakes if you don’t wanna waste the milk.. I would rather not risk it.
Best adviced to freeze after pumping, defrost the older (earlier) milk before every feed. If you are blessed with more supply, you may either combine the milk from the same day into one packet or pack it into your baby’s feeding portion. 😊
Do not refreeze thawed milk. 😊