Hi,
Welcome to the ehealthforum and I am glad to help you out.
What you are having is a recurring bartholin's cyst and i agree with your doctor that the swelling is maybe due to to the cyst being infected. It is good that you have got it incised. But now you need a course of antibiotics for 3-4 weeks so that the infection and inflammation subsides. Along with them you need oral antibiotics as well.
Once a recurrent cyst has been cooled off, a procedure called a marsupialization can be carried out in which the fluid from the cyst is drained and then the lining of the cyst wall is sutured to the overlying skin in such a way as to create a permanent drain site. This usually prevents recurrence of the cyst.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care.