It depends on the size and nature of the cyst. If 'simple', just a bag full of fluid, and relatively small, they will probably do a watch and wait. Most resolve themselves. If 'complex', meaning it has septations into different compartments, they will probably remove it.
You should have a Ca125 blood test. It's not totally reliable, but if it's significantly higher than normal, they will remove it sooner so they can analyse it in the lab.
Something like 98% of ovarian cysts are benign, but they can cause severe pain if they're on a stalk and it twists.
Weirdly, malignant cysts tend to cause less pain.
I had a 22cm cyst/tumour with no symptoms except a pregnant profile. 'Clinically benign', but major abdominal surgery to remove it.
Isme - ask your GP to do a Ca125 test and take it there.