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From above description, It appear that you are having anxiety
problem. Anxiety also leads to increase acid secretion which need assessment and treatment. Sexual problems also common with anxiety.
Continue treatment with welbutrin as it is good for it but may take 3-4 weeks to show effects. You can visit specialist like psychiatrist
(if not visited before). Cognitive behavior therapy from trained therapist also help in these cases.
I hope this information has been both informative and helpful for you.
Wish you Good Health.
Dr. Ashish Mittal