One week ago today I took a pregnancy test and it came up positive. But it was super light so I didn't believe it.

So I took another one the next morning and it was decidedly not light.

So. Like I said before, here we go again!
It is common for infants to spit up after a meal, but frequent vomitingmay be caused by GERD (gastroesophageal reflux disease), the upward movement of stomach content, including acid, into the esophagus and sometimes into or out of the mouth. Older children also can have GERD.
Most of the time, reflux in babies is due to a poorly coordinated gastrointestinal tract. Many infants with the condition are otherwise healthy; however, some infants can have problems affecting their nerves, brain, or muscles. According to the National Digestive Diseases Information Clearinghouse, a child's immature digestive system is usually to blame. They add that most infants grow out of GERD by the time they are 1 year old.