Hi ces, i had ovarian cysts in my previous pregnancy which was a pre-existing condition (unknown) until i went for emergency c-sect my gynae saw the cysts at right ovary and asked me during the operation whether i wanted to remove it. The size of the cysts was about ping pong ball size - 2 cysts altogether. I read from the internet that ovarian cysts would affect the chance of conceiving as one of the major symptoms is irregular period/ovulation (which i used to have). I was lucky to conceive my boy in less than 3 months (2 cycles of ovulation).
I think the best person to advise you is your gynae. Ask your gynae what are the options you have - whether to remove the cyst and fibroid before you start conceiving or you can go ahead to conceive without to worry about miscarriage.