Fear of the disease as well fear of consequences of the disease must be worrying you.
Increased heart rate
could be due to medical conditions also.
Discuss with your doctor about the possibility of it being caused by any drugs you are using.
can also cause palpitation
If there are no medical causes , you can start ativan
for a short period after discussing with your doctor.
But there are better drugs like flupenthixol , melitracetam ,etc