After surgery

I had my lumpectomy and full ancillary clearance in the 29th September. Over a week ago. My arm is the most painful. The back of it and swollen under my arm pit so uncomfortable does it get better. As went to see nurse Friday and she said it didn’t need draining and will go down but it’s self. And checked scars ok.  Also the sloshing from my breast is still going strong lol. How long does that last for. Such a weird thing to hear :/. Taking my dressings off tomorrow as she said 10 days is enough to be covered x