History of life thus far

June 23 2015 our baby girl was born, we named her Juleyana Joy. We loved her from the moment we knew she was growing in the womb. Labor was smooth, and without complications. Pregnancy was as well, with the exception of a Echogenic focus on her heart (which turned out to be nothing, very common). She was happy and healthy.At 2 months of age we took our baby for her check up, and to voice my concerns. I told our pediatrician that there was something wrong with my baby. She screams bloody murder every time I put her down and all day long. They said she had reflux, and gave us Zantac. We did that for awhile with no success. By this time, we noticed that she was spitting up every feeding more than usual, and continued to cry a lot like she was in pain. We continued to deal with it and loved our baby girl unconditionally. We thought with time she would get better, but that lasted almost 1 year. We did notice that she wasn't smiling as her older siblings did by this age, but we of course attribute it to her being so unhappy all the time. She also had poor head control (dropped her head) and arched her back with feedings. We continued to thing everything would be okay; we have 2 older kids age 4 and 3. We made it with them we can do it with this one. Everyday life is trial and error. Trying to figure out what we can to to make her happy.