It is difficult to come with a diagnosis with the given history. Although i would advise you to not skip meals as it would only worsen the condition further, if you're finding it difficult to eat your usual amount at one meal then you should increase the frequency of the meals with the reduced amount of meal and you can gradually increase the frequency as you can tolerate it. You should have antacids which would give you some relief and if you haven't had loose stools and haven't taken a deworming tablet in the last 6 months you could have it again. If the pain is persistent and worsening, I would advise you to go to the nearest ER and get the proper evaluation and treatment.