Ovarian Cyst

Went to Gynecologist Specialist last Friday .She does not recommend a hysterectomy because of my age , I become a diabetic faster and risk of general sygery . 
I have a 4.2 cyst on my last ovary I have I lost my other to a cyst back in 09. She gave me the depo shot . When I return in September she doing a sonogram to see if the cyst is bigger and pushing or torsion my organs . She is wanting me to get an IUD I have a lot of questions. What should I do help !!!!