Worried with the symptoms - Ovarian symptoms

I feel ridiculous for even writing this but my mind is running away with me. I'm 37 year old woman, who's had two children. On the 18th November I had this horrendous pain down below that lasted a few minutes - almost like child birth. Since I have been left with discomfort at the top left of my stomach, down the centre and like a smiley face underneath my belly button, with bloatedness. I have lost my appetite (not sure if this is due to being anxious), I also feel the smallest bit nauseous. Sometimes the annoyance can be felt on the right side of my back. My CA-125 can back in the normal range of 8. I am due to have a external and internal scan on Monday. 

I'm really worried that this could be ovarian cancer as my mum's sister passed of this.

I guess I'm just looking for reassurance x