Welcome to HCM.
The pain you have been experiencing is mostly likely to be musculoskeletal in origin but the possibility of liver involvement can not be ruled out.
As the pain is increasing while you cough , sneeze or laugh- i would like to go in favor of Muscular strain or a rib cage
issue. You have not mentioned whether you had any injury in that area.
Taking a pain killer with or with out a muscle relaxant
should help you. Meanwhile ice pack or hot fomentation will soothen the pain.
Though unlikely in your case, the possibility of a liver injury has also to be ruled out. You have not mentioned whether you have icterus ( yllowish discoloration of sclera of eye) or pruritis
or yellowish discoloration of urine , as all these findings favor the diagnosis of liver injury.
Just Get an Ultrasound
done to rule the possibility of a liver pathology and take a call on the treatment required.
Do not worry. You are gonna recover very soon for sure.