Post Root Canal treatment problems.

RCT done on last upper molar from last week of June till July. Got crown, after it was placed there was ton of pain when pressure applied/bite, removed crown.  Pain started to subside after considerable amount of time passed. I kept on having dental visits. Dentist asked me to wait. It's been 5 months. I don't have crown since long - only permanent filling. Issues now - 1 The tooth beside the one on which RCT is done, deviated from it's place since RCT, slightly down. Now it touches the bottom one when I rest my teeth and it feels uncomfortable and bulky, like an obstacle in resting teeth (sensitive). Sometimes it feels bulky while walking (even without resting). 2 Maybe its gums around the RCT teeth but I feel discomfort there. Eating all different things very comfortably, no pain. It's just when I'm sitting idle and not using teeth. Often getting my tongue there/putting pressure on RCT teeth with finger- in an attempt to cure it. 3 Teeth itching- Feels like brushing/grinding teeth.