What Treatment Is Suggested For Ovarian Cyst Causing Belching And Back Pain?

IM 49 and have ovarian cyst. ca 125 negative but i have chronic belching, back pain and some weight gain in my mid section despite the fact i dont overeat. my doctor thinks its just a " normal cyst with nothing to worry about even though repeat ultrsounds show some growth activity over the last year. at my age im a little scared. i have only had 4 periods this year and the cyst has not dissloved with a cycle.