Mastectomy Drain - increasing quantity and red colour due to haematoma

As I recall I had a whole solid clot worked its way down the tube which they said was normal too. They left the mastectomy drain in for nearly two weeks and I had no troubles after the removed it.
When I had axillary clearance I also had a drain from my underarm. They took that one out after only a few days and I did still have about 40mls discharge. I spent the next month in ER getting oranges sized swelling drained.
You are sort of at risk with a drain too long but then also prone to swelling if its not left in there long enough.