Hi Pam!
I am in Canada, but just went through something very similar. I am only 2 weeks post-op (2 weeks and 2 days), but thought I could shed some light into how the recovery is going so far!
The background: I played soccer 3-5 times a week before I found out about my cyst (I found out about it at the end of January 2015. I also walked a lot, did at home exerices (T25 - google that if you have no idea what it is
, about 2-3 times a week). So, fairly active I would say!
I found out at the end of January that I had a big cyst (not quite as big as yours), measuring 17x14x10cm. After meeting my specialist/surgeon, having a CT scan, and seeing the specialist again, I finally had surgery on March 5th, 2015. So, it took about 5 weeks to have surgery from the time I found out about the cyst. But, I am in Canada so things could be different 
As far as recovery goes, it's been quite good actually! Luckily they saved my ovary which they thought they'd have to remove. I didn't use any morphine in the hospital, and was released the day after my surgery as I was doing so well (usually they make you stay 2 nights). I was given a few prescriptions for pain killers, but only needed Advil and Tylenol extra strength, and rotated between the two. I was up and walking around the day after surgery (not far, I'll admit, just around the hospital corridors). It definitely hurt to walk around the first few days, but I thought it would hurt more!
Now I am 2 weeks and 2 days post surgery, and I'm walking a fair bit! I would say about 30 minutes a day. The pain subsided for the most part 1 week after surgery. Today I feel quite good, and I think I can start going for even longer walks, so will start doing that tomorrow.
Hope this helps! If you have any questions or anything, I will do my best to answer. I read so many laparotomy horror stories in terms of recovery, so I just wanted to put a fairly positive one out there 
Marissa