Panic disorder. What i am. please help.

Hi I am feeling nervous and restless since past 1 month. I fear I will die or something will to my loved ones. Once or twice in a week I really feel anxious. My ears make funny breezing noise and I have headache and acidity. I had palpitations which have stopped but my heart beat increases whenever I'm fearful. I am a normal working woman started thyronorm 25 mcg n then later 50 mcg for my Hypothyroidism for very TSH - 5.5. Now I stopped it on the advice of cardiologist. Got all my tests they are normal according to him but I still get anxious. Please help. I'm not on any medication sometimes my BP goes high then comes back normal. I have happy family no financial constraints. Got disturbed this January 2017 as my dad got hospitalised he is doing very much fine now but I'm confused have I gone mad or is it some drug induced. It's effecting my daily life. I get scared to be alone or go anywhere alone. Which is quite contrary to what I am. Please help.