I hate that I was right about this...
I have another cyst on my right ovary - not quite as big as the one that resulted in surgery in May, but almost (~6cm vs ~8cm). (It's a little bigger than the one on the left side that he drained during the surgery (5cm)). Doctor isn't in a hurry to operate again, but said that if my symptoms worsen or it continues to grow, that I'll be having another laparoscopic surgery this year. I get to "wait and see" - I'm supposed to go back in 6 weeks and get another ultrasound.
possible solutions to prevent in the future:
BCP (in addition to my Mirena) - possible issue with this is that it has triggered migraines in the past
removal of the ovary - they'll do it anyways if it's damaged, but it might be a good preventative measure, if a bit extreme.