Hi P., if she really has colic or tummy problems Kroger has some natural remedies that are great. They are usually on the top shelf with the baby products. Gripe water is what I buy, but they have several different things. It really was a great thing for my little ones, helped a lot.
Also, I have had all my children on reflux meds also. Colic usually only strikes in the evenings, reflux can happen all day. For reflux, burp often and feed slowly. After she finishes eating have her stay in a reclined position (not sitting up or lying flat) in a swing or bouncy seat or something. You can elevate her bed a bit on one side by putting a blanket or towel under one side of the mattress and that should help too.
They used to say to put cereal in the bottle but with the concern for early diabetes they don't recommend that anymore, but you could try it.
Reflux doesn't just mean that the child spits up all the time. you know the feeling of acid reflux? That's what she could be going through and it is very painful.
Also, she might have sensory problems. I didn't know my oldest child had sensory problems and she cried all the time. after putting her on reflux meds she improved, but was still very fussy. Later I found out she has SID- her brain interprets sensory information differently. Sometimes she is terribly sensitive to something like sound but she is also under sensitive and wants lots of movement like bouncing and touch and being held a lot. She wasn't spoiled, but her brain was functioning differently then normal.
HIH
S., mom to four girls