Hi, gd morning, Yeah its very right also what u shared, it may be gastric upset leading to deficit to nourish mind causing nervousness, but dizziness n breathlessness to be taken care on priority(which u investigated also), though its Vata-Raktaj issue can be very well managed with Holistic AYURVEDIC Approach by Basti or virechan n Rasayan so kindly consider to have AYURVEDIC opinion nr by u. Feel free to communicate me.

Hello vertigo cannot be part of gastritis inner ear disorders like meniere disease should be ruled out consult ent specialist for further evaluation and treatment.