@Dalene A friend of mine had something similar happen to her. She had to go back to the Dr several times to get it drained. I can’t remember whether she went to her GP or back to the surgeon.
I can understand why you are worried. Being diagnosed and having surgery is pretty traumatic without the added stress of bleeding so badly. I cannot remember at what level I had my post surgery drains removed but it was way after 60 - 80ml. On your recent hospital stay did they say if the bleeding was drainage or because the incision has opened up? Did the surgeon who operated see you while you were in hospital? I would certainly visit emergency if you are still bleeding badly and, if they have not been informed, would also contact your surgeon to set your mind at rest.
Do you have someone close to you who you can share your concerns with and who will support you during your recovery?
There are many members here who unfortunately have first hand experience with breast cancer and who are happy to share and support each other and I would like to welcome you to our community.
Take care and know that we are here for you.
I hope you can get some relief soon.