Why is there a sudden increase of fluid in my drain? It was putting out only 15-30ccs per day for three days, today 120ccs?

If you are having fever, swelling and increased drainage, I would go back today to see your surgeon.  These are signs of possible infection and swift attention to this is important.

Thank you for your inquiry.At this time you should not be experiencing an significant increase in fluid output.   This development along with your increase in pain could signify an infection.   I would call your surgeon in the morning if you haven't already.      

Drains are necessary for many operation to prevent collection of blood or serum from developing.  Unfortunately the prolonged use of a drain can lead to infection.  
What you have described sounds like it could be infection.  You should see your PS immediately for evaluation and treatment.
I hope this helps.