Welcome to HCM!
I have read your question and you mainly have
lethargy,
tiredness, feel dizzy and sleepy all day long, off work for some days due to all this and feel that you will pass out in night ( looks like panic attacks).
From my clinical experience I can tell that you need to get your self throughly investigated, more because you are
overweight and there is family history of heart attacks. it will be good that you get your blood counts, ECG,
lipid profile, LFT , thyroid function test, sugar levels and RFT done to check all organ status.
Your symptoms resemble depressive disorder (as you have lethargy, sleep/ lie down all tiem, anxiety/feeling of passing out) (one might also have anxiety along with it) and I can tell from my experience that you will feel much better with medicines like
sertraline 50 mg to 100 mg or escitalopram 10 mg to 20mg, in some time. And
depression is very common illness and is Treatable.
Apart from medicine you Should go for walks at least or in any form increase your workout/ reduce the weight.
I can understand that you just don't feel like doing anything and this is one of the symptom of depression. Visiting a
psychiatrist will really help you in getting better and even in reducing your weight.
Hope you get better soon and go to work again!
feel free to ask more question
Dr. Manisha Gopal