Hello! I have

Hello! I have got my tooth 36 composite filling replaced for the third time yesterday, with in a year!
During first filling it was diagnosed that it had recurrent caries. Because it was causing a lot of pain on biting hard or crunchy food. Same problem persisted with the second filling too! Some times I feel mild pulsation in it. Went to dentist to get it checked for high spots but no use.
I got my 36 filling restored again with composite 2 days back but its still sensitive although much better then before but I am still not able to eat crispy stuff because it’s cause pain on chewing some time. It’s becoming a nuisance as I am not able to eat from that side except for soft food. There is no hot or cold sensitivity. But when I apply remineralizing tooth paste on that tooth it feels we’re sensitive n some times I feel it pulsate too! Please suggest me what should be done? Should i wait for 2more week to see if it settles or should I go for an RCT? This tooth is over erupted too.