Hello and thanks for your post, 

I would get in touch with either your GP or the gynaecologist's secretary. If they planned to monitor your cyst to see if it was growing they will probably have written in your notes when you are next due a scan. Your hospital should have also written to your GP to say how you would be followed up.

I can't say what they would recommend as a lot would depend on the size and whether you are having any symptoms from the cyst.

You may find the following information helpful about the different types of cysts and how they are managed written by Woman's Health here

and a leaflet written by the Royal College of Gynaecologists here

I hope that you find out more soon.

All the Best,

Catherine