My story:
1. A lower molar tooth(3rd from back) was drilled and filled 20 years
ago. Fillings gone over time, cause sharp pain a month ago. Infection
was stopped by antibiotics(Z-pack). Further RCT, core buildup w/p, and
crown-porc, were prescribed by my dentist.
2. A week ago,the tooth was RCT treated by another endodentist on a
single office visit. The prescribtion includes a 8 days 2g/day
Penicillin VK plus strong painkiller. I am waiting for the
core-buildup and crown procedure by my dentist scheduled 8 days after
the RCT (2 days from today).
3. After the RCT, I got a big lump on the lower jawbone, I did not
take any pain killer, and luckily not so much pain.
But there is a dull, soring, and sharp mixed discomfortable sensation
arises whenever I suck or touch a specific spot on the tooth, let
alone if there is any food fall between the gap of the lower RCTed
tooth and its upper counterpart while biting.
Plus, I developed some kind of dizziness 4 days after the RCT, even
during sleeping.

My question:
1. What shall I expect before the corebuildup, a totally senseless
tooth? Did the endodontist finished his job of cleaning all the
canals? If not, shall I ask the dentist or endodentist to redo it?
2. How long I shall wait  between RCT and corebuildup? 8 days too
short?
3. Is it common to have the dizziness, caused by antibiotics or
innerbleeding?
Somebody Help.....~~~~~~~~~~~!!!!!!!!!:(