Hello and Welcome to Healing Well. This is Kitt and I hope that we are able to provide you with support as you will find the members here very caring.
Let's start with the Celexa, it can cause Postural hypotension. Not sure if that is what you have been experiencing?
Now the cardiac problems...............I am guessing here that you are reporting Ejection Fraction % and 60 % is in the normal range. Obviously you were etremely ill with Peripartum Cardiomyopathy. You have every right to have Health anxiety issues.
What I am wondering is if you have a therapist as you may benefit greatly from therapy and getting help in learning how to deal with the anxiety?
Health anxiety refers to an excessive preoccupation or worry about having a serious illness. Often, health anxiety persists even after a physician has evaluated a person and reassured him/her that his/her concerns about symptoms do not have an underlying medical basis or, if there is a medical illness, the concerns are far in excess of what is appropriate for the level of disease. Health anxiety is often characterized by fears that minor bodily symptoms may indicate a serious illness. Reference: Wikipedia, the free encyclopedia.
In regards to your question can these sx be caused by anxiety, yes they can as well as medical conditions.
I am not a professional so I can not tell you they are all due to anxiety, each person is different. I hope you can advocate for you and try the therapist. It has helped so many here including myself.
Please keep posting and know we care.