Evening everyone!

Last night going to bed I felt a bit funny. Couldn’t put. Y finger on what was wrong but defo something not right.
Awoke this morning and felt really shaky and uneasy and a little nauseous. I also had an ache down my left arm.
I have been panicking that it’s my heart (my uncle died from a heart attack last week, happen at 1am, he was dead at 5am)

I took my Propanolol that I am prescribed, usually take one every morning and one/two through the day as needed and then citalopram at night.

It seems to have worn off me, but I keep worrying it’s going to come back and I’m going to die.
Still got niggly pains in my jaw, back and stomach, but I think it’s anxiety giving me those symptoms.

I’m terrified I’m going to have a heart attack and die.

Please tell me I’m not alone and how I can stop this