Hi, I'm 20 years old and I've been suffering from anxiety and panic disorder since the age of 13. Since then, I've been taking Escitalopram 10 milligram tablets to help me cope with my anxiety. About 4 years ago, I was also diagnosed with palpitations and was prescribed Atenolol 25 milligrams to help solve the issue, but recently I have been experiencing a hard pounding sensation in my chest when I exert myself in any way, even when I take a simple walk upstairs. I've also been experiencing other problems, including cold and clammy hands and feet, digestive troubles, excessive sweating and shakiness. I'm aware that I will need to see a doctor to help me resolve these issues, but I would like to ask the opinion of an online specialist so that I have an idea of what I should be expecting before I see a doctor in person. Thank you in advance!