Sometimes when cysts rupture they get stuck. It happened to me, and it almost killed me.
It sounds like you need to get an appt. right away to check it out. Cysts usually cause intense pain when they rupture. But, 8 days later....they usually cause more of an ache. The stinging and burning sounds unusual to me. Hernias can cause that type of pain, as can other conditions. Please get it checked!
Take care,
Shelly