M.P.
What did the doctor suggest? When you say she's vomiting after every feeding I would consider that she's allergic to milk protein if you're feeding her formula or something in your milk if she's breast fed.
Another possibility would be reflux, a condition in which the esophageal sphincter is immature allowing the milk to come back up.
After your SWH A baby doesn't need to eat every hour. You'll be spending a good part of your day feeding her. Jarred food should just be something extra. At 5 months it's not meant to be a part of their nutrition needs. Since you're concerned about her spitting up, I suggest you not feed her jarred food. That may be causing the problem. Feed her 3-4 oz of formula as often as she wants it. Try feeding on demand to eliminate the feeding too much possibility.