If she has reflux even a little, it will be made lots worse by things like illness, coughing especially, teething, emotional upset, etc. It takes awhile for their systems to recover. If she's not acting like she's in pain, then she may not need meds. However if it continues you might want to make sure if she has it or not.
My oldest, Abi, had projectile vomit reflux from birth to 6 mos. but was a good eater and would just vomit and be hungry and take in more. We never put her on meds, either. Nitara was miserable from the start and her reflux is a lot more severe. It started with silent reflux, a gurgly voice in the mornings, little coughs, spit up even 2 hours after the last feed. It got progressively worse but she's a rare case. Most of the time they outgrow it pretty quickly.
There's a test that can be done but you probably wouldn't agree to it unless her problem got worse or didn't go away. It's an endoscopy with biopsy. The put the baby under, then put a small camera down into the stomach and look for acid damage. THey also take tiny tissue samples to look for inflammation (signs of severe reflux at the cell level-- not always visible to the eye) and allergies. If allergy cells show up then the baby is allergic to something he or she is being fed. Nitara has had the test done twice and I'm glad because it lets the doctor and me know what's going on and if her meds are effective.
Nitara has some kind of dairy thing going on, but she can eat some dairy okay, just not a lot. When it starts to build up in her system she starts to vomit a lot more. Kids who have allergies are more likely to have reflux, asthma, and allergies. They are all related. I would stick to the elimination diet just so if you have to see an Ped GI you can tell him/her that you are on it, and that would pretty much rule out allergies and point to reflux or something else.
Hope she gets better soon so you can stop worrying!
mama to Nitara who has a feeding aversion due to severe reflux, is 100% tube-fed, and on Prilosec and acidophillus
7yo: "Mom,I know which man is on a quarter and which on is on a nickel. They both have ponytails, but one man has a collar and the other man is naked. The naked man was our first president."