Four weeks ago; I had experienced severe throbbing in my lower ba...

Four weeks ago; I had experienced severe throbbing in my lower back around my kidneys. I was almost preped for surgery when I had finally passed a kidney stone! I never had this problem before and since I have been on this BCP I have been experiencing - extreme mood swings/depression, numbness on my left arm, severe headaches, fatigue and the pain on my right side. I have had so many tests done recently because of the pain - no one knew what the problem was caused from. However, on a recent ultrasound I now have a large cyst on my left ovary! Does anyone know if BCP or Loestrin can cause cysts?