Hey Roxana!
Well, without knowing the relevant clinical details or a detailed clinical evaluation it would be difficult to determine the cause of your symptoms. Assuming its lower right quadrant of the abdomen and not thorax, possibilities that may need to be considered include GI/ GU infections, inflammations, trauma/ injuries, growths/ masses, neuro-muscular causes etc. Thoracic discomfort could be related to causes related to the GI tract/ liver/ GB, causes related to the chest wall/ respiratory tract etc. I would suggest getting this evaluated by an internist initially and depending on the cause diagnosed/ suspected, it can be managed accordingly or specialist care may be sought.
Hope this is helpful.
Take care!
Thank you so much DrKaul.