B.G.
One of the challenges of the bottle fed baby is that the "hungry" cry and the "oops, you fed me just a bit too much" cry sound the same. Since you are also dealing with reflux and trying to find the right formula, it's very possible she's simply trying to deal with too many things all at once.
It's been a while since my guys were that little, but I thought I heard the recommendation of waiting a couple of weeks before switching formulas. This was to give the baby's system some time to adjust and to help you determine exactly which formula it was that was producing the good and the not so good results. You might need to just give each formula more time before switching.
Have you tried the 5 S's? Swaddling, swinging, shushing ... can't remember the others. My boys loved the swing! Sometimes I would put the in the swing after feeding them, and they would just swing into a nice nap.
I'd have to look it up, but I'm pretty sure "colic" is just the word doctor's use when the really mean, "I have no medical rational for why your child is crying."
With my oldest, I spent many hours in the rocking chair watching tv. I also went to a M.'s group, and many of them said the same thing. One of the gals would say (3 or 4 times), "I was watching "Bringing Home Baby ... " It soon became a joke.
We also took walks in the stroller. Motion seemed to be good for him. I think the swing and the stroller also helped because he was slightly inclined.
Hang in there and good luck!