Am I feeling heart palpitations, hard time breathing, throat blocked, flu like symptom's?

See doctor NOW!! Shortness of breath is a serious symptom that can be life-threatening. So, it is a symptom requiring an emergent evaluation. "throat closing" and heart palpitations, in conjunction with shortness of breath, is also potentially life-threatening. You need to be evaluated in an er so these symptoms can be diagnosed and treated right away!