Ovarian Cyst??????????????

i have a ovarian cyst. i went to the obgyn about a month ago and she said she could feel it internally and that it was very large. She said gave me a birth control perscription and said it would reduce the size and make it not hurt as much but my stepmom has to get it filled and she still hasnt. Im worried about it because i have heard if it is too large then it can cause scarring and you wont be able to have children later in life possibly.. is this true?