<s>[INST] Ok, Ive been dealing with burning chest pains, ive had foam like saliva because of it, i randomly have stomach pains like i might vomit, and sometimes when Im by myself my legs will randomly give out on me when i stand for too long.. Im only 21 years old, what the heck is wrong with me? [/INST] Hello, Thank you for asking at Chat Doctor. I went through your history and would like to make suggestions for you as follows:1. As you have burning chest pains, salivation, nausea and stomach pains, I would think of causes like gastroesophageal reflux syn Chat Doctor. 2. I usually suggest my such patients antacids like omeprazole or sanitizing 30 minutes before meals.3. I would suggest you to avoid hot/spicy foods, caffeinated beverages, alcohol and smoking.4. If this does not help you, I would suggest you to consult a gastroenterologist who will examine you and may suggest YOY some investigations.5. Inability to stand for long may not be related to other symptoms. Hope above suggestions will be helpful to you. Should you have any further query, please feel free to ask at Chat Doctor. Wish you the best of the health ahead. Thank you & Regards. </s>