Dear Welcome to HCM We understand your concerns I went through your details. I suggest not to worry much. Prevacid is prescribed for Heartburn & Acid Reflux Disease (GERD). As you have gastric troubles the prescription must be useful to you. Side effects of Prevacid may include headache, nausea, diarrhea, stomach pain, or constipation. In your case, your pain around your neck, shoulder blade and right chest could be due to your anxiety as you are taking medication for GERD. As a home remedy you can chew roasted garlic thrice daily with food. that should give good relief from GERD. You must also understand that GERD and anxiety are hand in hand. They also occur simultaneously. Therefore, you could benefit from psychological counseling and meditation. I can help you through telephone. Contact me through customer care magic at www.healthcaremagic.com. Hope this answers your query. Available for further clarifications. Good luck. Happy new year.