Hello, Igave Birth To A Baby Girl On May 25

Hello, igave birth to a baby girl on May 25 and I am have back pain right underneath my right shoulder blade and it hurts through to my chest. I have been to the doctor and he said it could be MCS mammory constricting sendrom, he gave me a shot for pain and said to use ice (no heat, that would make it worse) the shot helped for about 6-8 hours. He also said to take 600 mg ibuprofen every 6-8 hours. That was June 12 and I had not been drinking enough water ( I am breastfeeding, I am pumping because my baby hasn't latched on yet ) so started drinking more water and it was feeling better. I had a little back pain on Saturday nigh. And it felt better b Sunday evening and I have been doing ok until last nigh and I am in really bad pain since around 1am this morning.... I looked up the MSC thin and I don't feel like that is my problem.... Please help me, I have talk to a couple doc and can't figure out what to do ....