Did you have an EKG or any other heart tests when you went to the ER? Was your heart racing when you were there? You might do some reading on "afib".
I believe they should have done something for you if your heart was racing when you were there.
My only suggestion is for the head/brain. I have read that putting Tea Tree Oil on your scalp will cause Tapeworms to leave.
I have Tapeworms and I have something in my scalp. I began using Tea Tree Oil Shampoo a while ago and am experiencing a lot of relief. I have also dabbed straight TTO on my scalp in spots. It didn't burn or cause me any discomfort. You might give this a try.