Pain after ovary removal

Hello!! I had a cyst on my left ovary that caused me considerable pain for seven months. The doctor tried to save the ovary but had to remove it with the cyst. She found very little endometriosis present and couldn't even stage what she saw as it was so minor. This was in December 2016. I have had the same pain around two days before my period is over that extends all the way through my fertile window and it is the same pain on the left where there is no ovary anymore.....It ranges from cramping to knife like twisting and radiates down my left thigh to my lower back. I am so confused as to why I would be still having pain when there is no ovary.....If anyone has experienced this please share! I am probably going to see another doctor! I do not want to be in birth control because I am trying to conceive.