Welcome to HCM. I am Dr Anshul Varshney.
I have read your query in detail. I understand your concern.
There can be some coagulation disorder, ITP
or even vasculitis
I would like to see the rash/bruise
. If possible attach a pic.
Also get following investigations:
1. Hemogram including platetlet count
This is my best advice for you with the available details, if you have any further query, please ask us.