Hello and welcome,
Regarding twitching under your left collarbone is concerned,the problem is associated with lifting of heavy boxes which is a part of your job.
I would advice you to get consultation by a physician regarding this.
Wisdom tooth which is impacted usually shows symptoms of-fever,headache,ear and throat infection
Headache will stop once you get the wisdom tooth removed.
and stressful job.
Maintain oral hygiene
Take rest for a while in between your job.
Take complete course of medicines too.
Warm saline and chlorhexidine
gargle can be done.