My dog is throwing up

[Seattleallstar]

amid the other unplesant bs ive had to deal with, my dog has been barking/crying all night and this morning started to throw up. Anyone know what this could be for all u dog owners out there. Its bigger chiwawa i know it spelled wrong but im really worried, its also old we have prolly had the dog now for 17-18 years

thanks for any advice, and yes I know it will prolly have to go to the vet and I might have to hear some sad news