Middle of the Chest tightness. Issues.

Hi detailed information of past and present. 1) 3months back i had vertigo and went to hospital they did ECG , bp , sugar check and all normal. Gave multivitamin.. but still i felt  weak.. 2) after a week did full stomach ultrasound grade 1 fatty liver only.. rest all normal.. 3) same week did vitamin d and b12 test. Finally got to know b12 is 70 and d is 16. So started injection and tablets immediately felt better after that.. 4) as per doctor suggestion went for endoscopy and found that h pylori +ve (erosive gastritis) and took treatment for 2weeks antibiotics and 2months esomac 40. Felt really better and after the treatment.. lost about 6kgs with the only veg diet.. Present all fyn but sometimes feeling chest tightness and light breathing  and mild headaches.. always feeling something in my throat. sometimes experiencing anxiety as well.. diet totally changed no outside food, no fatty foods, less spicy.. please hellp me on chest tightness issues..