Hello, and thanks for your medical question on E Health Forum.
From the history and the description the possibility to know what exactly might have bitten you is diffcult. But it seems that the site is inflammed due to secondary bacterial infection.
Your pain might subside by regular application of ice packs and use of ibuprofen.
If symptoms worsen with onset of severe pain, change in color of the wound, etc seek immediate medical attention for medical treatment and oral antibiotics.
I hope this helps.