Hi My Partner Who Is 30 Years Of Age Has

Hi My partner who is 30 years of age has been complaining for 6 weeks with a pain down his left side and stomach he has had a chest x ray and this came back clear, he has been to the doctor at least once a week for the last 6 weeks and she is saying this is due to stress, and suggested that the pain is maybe ulcer related..... of late i have notice that his colour has changed he is a bit ashen looking..... the pain is getting worse he has also been prescribed gastro tablets but these are not helping