Welcome in H.C.M.
I have gone through your query regarding sudden numbness
on ear , weakness and heat sensation over chest.
Though your CBC and ECG are normal but this type of episode had repeated twice and both attack appeared at the time of eating, therefore one may think it to be gastric but one should rule out cardiac problem as well.
Though your ECG is normal but nobody can rule out all cardiac things by this test only. so you should consult a cardiologist
for thorough cardiac examination and necessary investigations to pin point the diagnosis for proper management.