Has anyone had back rib pains after having a baby?

While I was pregnant I thought that the baby was going into my ribs and it hurt my back and my ribs which made it really hard for me to breath. But now I am still having the pains after my baby is born 3 weeks ago. It feels like I can't breath and under my ribs and ribs and back are getting pushed on so i can't breath well at all. It comes and goes not regular as yesterday was the first time i had it happen to me since I had my little one but it happened three times. twice while i was sleeping and once after i ate. During my pregnancy the doctors thought it was the baby in my ribs to and or dehydration so i constantly drank water while it was happening but after drinking two bottles of water i had no more room and made myself throw up for more room but throwing up seemed to help. Unless the advil that i took kicked in. It usually happens for about 15 min at a time sometimes shorter.I was told by friends it could be my ribs and back going back to place as i am a smaller person or it could be gall stones. Has this happened to anyone before.