It seems to be bruising. I was bruised for a number of days and also have a massive swelling/lump under the glands on day 6. Its all swelling mate. I would not worry. It will take months for full recovery.
It will definitely take 2-3 months for you to hit full size and for the discomfort to really go away. The best thing I can suggest it to be patient - the healing is definitely a process. In a couple of months things should be much better.
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