Every woman gets cyst on there ovary normally 2 weeks after your period. The cyst normal full off during your cycle. - which might explain why one of your doctors see a small cyst and the other did not it may have dropped by then.
However some times these cyst can grow and become painful and cause pain.
Some gp will wait to see if the cyst burst or fulls off in its own time depending on how big the cyst is and how much pain it is causing.
In january of last year I was rushed to a&e because one day I woke up and suddenly had extreme pain, after hours of suffering the evening came and I was rushed to hospital.
X-rays where done first I was told I had kidney stones and hour later I was told it was my apdixs (spelling) and I was taken to a ward and told the next day the would operate to remove them.
I could not sleep as the pain was so bad and by the morning my belly had blown up like I was about to give birth, I paniced and so did the nurses and called the doctor and requested that I have a scan done - they could not see anything so they did an internal scan which showed that I had a 15cm by 15cm cyst on my right ovary which had twisted my tubes. I was rushed there and then into the operating room where they removed the cyst, ovary and tube.
Two and half weeks later (feb last year) I was rushed into hospital again in pain - they did a scan that showed nothing but then did an internal scan which showed I had another cyst but on my only now ovary left - my left ovary - and I was again operated on top remove the cyst but this time they saved my ovary because they found the cyst in time before it had done any damage.
If you are still concerned about the pain that you are in and believe you have a cyst then I would say find a hospital that use internal scans as this is the only scan both times for me that picked up the ovary.
The only things the consultants could suggest that I do to prevent this from happening was to take birth control pills. I said I was trying for a baby and they explain how low my chances are and that the same thing could keep happening unless I take birth control or full pregnant - a year later and in pain each month for at least 2 weeks out of the four and still not pregnant but I will stay strong!
Good luck to all of you xx