Welcome to the community. I am sorry you are going through this. That is a fairly large cyst so it may have to be removed. Do you know the type of cyst - simple, complex? If you do end up needing surgery, it is best to have a cystectomy so that you can keep you ovary and its lifelong function of producing hormones that are essential to every aspect of health.
Cysts can cause abnormal bleeding due to hormonal changes so it may explain the bleeding.
Keep us posted on what you find out.
I dont know the type of cyst yet.trying to get appointment for second opinion.anybody who have large cyst and resolved with medicine? :(