Your problem of drowsiness and vertigo was because of low
sugar levels
Pp low is reactive hypoglycemia and there is no specific reason for this particularly.but if you have another problems or you are taking any kind of medicines that can cause low pp levels.and anxiety is because you have low levels of sugar.need detailed case history to know proper cause why you have all these complaints
Next Steps
consult me for further teatment details
Health Tips
improve your diet and whenever you feel low do take some sweet things