I suffer from gallbladder problems and in all honesty my pains even confused the dr, gall bladders can irritate your diaphragm muscle just under your rib cage Whig can cause referred pain such as right shoulder pain. So follow thru with the appropriate test to either confirm or rule out gallbladder issues.
In some people, yes, gallbladder problems can show up with a left side pain. It's not what would be considered 'typical' but it does happen.
GB pain can be severe enough that it can literally put you on the floor feeling like you want to die. The feeling of a 'heart attack' is more usually attributed to having something like esophageal spasms.