Thank you for your query.
You mentioned that for the past 3-4 weeks you are having repeated 'colds' and have now noticed a bruise
. This is apart from your complaints of headache, tiredness
, palpitatioins and chest/abdominal pains. Though you have consulted a neurologist
you need to consult your pediatrician
or general physician who will examine you clinically and order appropriate investigations in order to come to a definite diagnosis. It is not uncommon to have complications of upper respiratory tract
infection which may be manifesting as bruises, palpitations and chest/abdominal pains.
I hope I have answered your query to your satisfaction.
Wishing you an early recovery.