I Am 28 Years Old And I Having This Stabbing

I am 28 years old and I having this stabbing pain in my mid back. I went to the emergency room and they said I had a very slight kidney infection and they put me on antibiotics. That was last Saturday. I am taking the meds but the pain is not gone. I had my gallbladder out in September and it is almost the same pain when I was having my gallbladder attacks. I cannot get into my regular doctor until Monday,