Diagnose with Endometriosis Cyst

A
Hi all,
I have an endometriosis cyst on my left ovary and I just know about this after I had a very sharp pain at the left pelvic area on 28/10/16 (my first day of period) and I never have a period pain before and my period is regular every month.
Right now, the doctor is waiting until my period is over to decide whether i need a major surgery or not (if the cyst decreases in size). Fyi, the cyst rapidly increases in size from 6cm (28/10/16) to 8cm (31/10/16) due to auntie flo.
The doctor advises me to remove the cyst so that both my ovaries will work and increase the chance to get pregnant. The only way to prevent the cyst to recurrent is by getting pregnant or taking birth control pills.
I feel so demotivated at this moment as I have been ttc since April 2016.
Anyone on the same boat with me and have experience diagnose with endometriosis cyst and able to get pregnant?
Thank you for your support.