Are tiredness, depression and breathlessness signs of a heart problem?

YES BUT UNLIKELY. : Check with pcp ask pcp to hyperventilate you and if not reproduce symptoms a search for other causes needed . Suggest metabolic work up . Including vitamin assay. If above negative suggest pulmonary work up.

Possibly: Clinical depression is a risk factor for both anxiety and heart disease. And heart disease can cause depression. Therefore it is important to get a full medical work-up with your primary care doctor to clarify the cause of these symptoms.

It could be: It could be, but there are other things it might be. A medical exam and, maybe, some tests would be a good thing to do.

DEPRESSION & CARDIAC: Have a physical exam to rule out a physical illness. When you have a lot of anxiety you are more likely to have a panic attack. Panic attacks can mimic signs of a heart attack but are very treatable. Please consult with a Clinical Psychologist for psychotherapy to help you with your depression with ZOOM.com. Medication can be helpful prescribed by a Psychiatrist. Anxiety is higher due to covid.