I'm feeling a bit anxious because I've been experiencing a heaviness in my head and pressure in my chest. I've already had some health check-ups, including blood tests like CBC, thyroid, lipid profile, and sugar levels, and they all came back normal. I've also undergone an ECG, stress test, 2D echo, and a CT scan of my brain, and those were normal too. I'm just not sure what to do next or if there's anything I should be worried about. Can you help figure out what might be going on?