Wetness and blood color changes in RCT.

I have tooth pain like tapping and biting on it,hurts for any little pressure on it since 2020.Xrays and cbct was normal.But severe pain,so had rct in 2020.Endo retreat distal root alone in 2021 as it has some gap at end of root tip. No relief.It started as severe jaw pain under ear,neck and I still have same for 2 years. MRI and CT of jaw, neck normal. So he said he will try one more full retreat before extraction.Taken new cbct and normal. So opened the whole tooth 3 days ago.One root in mesial canal has some wetness in old filling.He said it supposed to be dry but it's wet.he smelled it and it stinks. blood color like purplish there and not blood red. He didn't say if it's infected.Didn't say anything.He told me these details and placed medicine inside 2 canals and put me on penicillin VK 4 times a day for 10 days.Asked me to come after 6weeks for second step.Is this blood color change&wetness means serious infection? Will it spread across like sepsis?do I need extract immediately?