that sounds like good progress!
the E2 levels are supposed to be 200/mature egg. That can be a better indicator than u/s bc sometimes follies can hide.
Some tips to help w/ ovary pain
1) Get as much water/gatorade through you as possible
2) I found sitting for a long time was the worst. Laying or standing was more comfy for my abdomen
3) Have you pooped? That can increase pain as well
4) We had to drive long distance to the RE, so I extended the lap belt potion for our 2h+ drives with a clothespin! I also wore ALOT of skirts.
Basically, just do whatever you can to keep pressure off of that abdomen.
Best of luck and HTH!