Has anyone had pain.....

M
Has anyone ever had pain on one side near ovary/tube in early pregnancy and it NOT be ectopic?? I spoke to my OB's nurse about it on the phone and she said it's because my ovary is releasing progesterone? I just don't get it. By the way, I am 4 weeks today. 
I am so overly concerned that I'm having an ectopic that I'm worried I'm creating the pain in my head. 
I just don't know if I can get 100% excited until I see that my baby is in my uterus and not in my tube. I have had 2 previous ectopics in my right tube, which has since been taken out completely. I'm so worried for another in my only tube left.