Hi thanks for asking question.
Here are few possibility in your case.
1.First your presentation is acute and work related.so mostly it could be because of muscular strain by overworking , bed sleep posture or some any unaccoustemed situation.take enough rest with
analgesic for that.hot compress also helpful.
2.Second if you have associated upper abdomen pain than
acid reflux might lead such type of pain.
omeprazole taken for it.
3.sometime excess stress means anxiety related to work might lead such type of pain.
4.If still cause not clear and pain increasing then it might be like
costochondritis or myositis like condition.
5.If you have headache, cough ,
sore throat then respiratory viral infection might lead it.
Symptomatic management done for it.
So avoid stress and rule out one of the above condition.wish you good health.
Dr.parth