Pain in gum and tooth hurts for pressing

Tooth second molar hurts for pressing with fingers on it. Dentist did that and said it shouldn't hurt but mine hurts.so he said to extract it. Then I saw another dentist and he probed that gum. It was so painful for probing. He said it has 4mm pocket and I can get SRP done on that tooth. But the other dentist thinks I have hidden infection underneath that tooth and that's causing my gum pain surrounding the tooth. So he told me to extract it. Is extraction a good idea? Or can I do SRP tomorrow even though there might be infection underneath? Will that be okay? As I am typing this, I have severe throbbing pain in the gums surrounding that tooth margin. It hurts so much in the gum on the right and back side of the tooth. I extracted #46 last year  for same reason. It was painful for pressure and I had RCT, retreatments etc. Cbct scans didn't show anything but 46 was infected at bottom when pulled. I still have pain in 46 region. What should be the next step with 47? Ext or SRP?pls.