Hi thanks for reaching out here, yes when there are stress,it is natural you feel gastric, irritation in chest, throat burning, uneasiness in body.
The place you are staying and external crisis might had added to your previous stress . I am not how much you are able to follow the routine and diet.
Try to avoid high fat foods, oily and not to stay in empty stomach for a long time..
In the meantime understand the trigger causing you stress, anxious.
Know your strengths, fix your routine and goals related to your professional and personal life.
Next Steps
you can take the help of psychologist to deal with this situation , take care.
Health Tips
try to avoid intake of stimulants may be 5hrs prior to sleep, exercise, enjoy socialize with people whom you are comfortable and happy, spend time with family members, know your goals, try to be organised, so that you feel less stress full. chant omkara along with deep breathing exercise before and after bed time. could refresh/ relax yourself.