Hello, It looks like you have lost your appetite. Meth and weight loss are often connected. In some cases, methamphetamine may be used purposely to lose weight, and other times, it is simply a side effect of continued abuse. You are suggested to cut on these addictions as it has already started affecting your health. If you stay without eating for two days or more you may develop symptoms like bloating, belching, nausea, and vomiting. Never stay hungry, it will cause sodium-potassium imbalance of your body electrolyte system. You may get low blood pressure, low blood glucose and unstable vitals that they may cause you fatigue and weakness. Take nutritious home made food rich in minerals and proteins. Stay well hydrated and take adequate rest to get back to restore your energy. Chest pain may occur due to gastritis as you stay without eating for prolonged time. You can take antacids, PPIs to ease discomfort. However, chest pain can also get triggered by addictive drugs (meth, cocaine, etc.) and cause sudden rise in blood pressure, heart rate and contractions, etc., triggering risk of a heart attack. Adverse cardiovascular effects of methamphetamine use are chest pain, tachycardia and other cardiac arrhythmias, shortness of breath and high blood pressure, etc. You are suggested to get clinically examined by a Cardiologist so that all routine cardiac tests can be done to rule out any developing Coronary artery disease, CAD. You will be treated accordingly. You should cut on all addictions to stay healthy. You should join a detox center if needed. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Nupur K., General & Family Physician