Hi i am hoping someone can reassure me

Nearly 13 years ago i was having some real bad pains, after being back and forth to the gp and hospital i finally had a mri which located a 2.5cm ovarian cyst, wasnt told what type or anything, they had scheduled a key hole surgery to remove but i found out just before it that i was pregnant with my now 12 year old son and that i couldnt have it done, fast forward to now, for the past for months i have had none stop on off pains ended up in hospital over the weekend went for a scan today and they found my cyst is still there she couldnt tell me much just said doctor will be in touch 7pm tonight doctors phone, said that my complex cyst is still there and has grown large,  i didnt know it was a complex cyst, he is sending me to a specialist to determine if its cancer

Can having a cyst like this sat growing for 12 years turn the cyst cancerous or dangerous