Pinching in the left ovary area.

ttc for rainbow baby • My husband and I have been together 7 years. Married since Aug 2014. We started ttc in July 15 and got pregnant first month and it ended in an ectopic. We are now waiting for our rainbow baby .
Period is to start in 7 days. I am having pinching sharp pains off and on. Nothing that hurts just a little nudge here and there. Is this common for pregnancy?