How would I know if my 6 week old has reflux vs normal spit up? She's big, gaining weight fine but spits up a lot, both during, immediately after and up to 2 hrs after a feeding. She's using Enfamil gentelese formula. She seems to have a horse cough often, trouble falling asleep though she sleeps well once asleep, fusses for the bottle but then screams if i take it out to burp her during a feed. USed to be pretty mellow, but past few days has been a little fussy for no reason and having trouble setting to sleep. thanks in advance.