Results and some answers.

Surgery lasted about an hour. They were able to complete it laparascopically with four holes instead of the usual two with my belly button getting the brunt of it and having to be opened a little more than normal to get the mass out in pieces. Baby came out undisturbed and just fine.

Belly Before

Belly After

Belly three days later

What they found was surprising: not only did I have a 9 cm mass (larger than they had expected), but it was twisted on itself three times. The fallopian tubes were barely recognizable as they were twisted and knotted, and part of the ovary had begun to show necrosis, or tissue death due to being cut off from its blood supply.

Starting at the top: Uterus then curled fallopian tubes and then the mass/cyst/ovary. 

They were surprised to find the torsion or twisting because previous imaging hadn't shown it. They felt that it appeared on earlier ultrasounds that there was blood flow to the ovary and wasn't twisting/torsion but it may have been the blood just caught in the twisted fallopian tube that they were seeing. Sounds like they were a little baffled. If this had been left to itself, the mass itself likely would have died off due to lack of blood supply and maybe just fallen off and gotten reabsorbed into my body. This is where I need Adam to edit because I am still foggy on these details. They were explained more to everyone else while I was in recovery.

The pain I was experiencing was the actual twisting/torsion of the mass. They explained it as the ovary typically just kind of hangs there, and due to the weight of the mass and the increasing pressure from the baby, it was being pushed around and twisting on itself. Ouch. They further felt that it was possibly twisting and untwisting in the previous months, explaining the intermittent pain and that in the last few days it had really gotten jumbled up causing the sudden increase in sharp, severe pain.

They're still unsure if the mass was always this size from the start or recently grew more. The good news is that after gross inspection, the oncologist felt that it was not cancerous. Thank God. It was sent to pathology for further testing and we should get the final results soon, but it seemed there was no real concern. 

Phew.