Hello
Thank you for posting your query at DoctorSpring.com
I sincerely apologize for the late reply.
Your symptoms of chest heaviness and tingling in limbs predates the high altitude ascent history. The worsening of the symptoms as you climbed could be a part of high altitude sickness. However it wouldn't persist for 2 weeks without progression. As far as evaluation of your chest discomfort and palpitations is concerned I would like to advice you a 2D echo a treadmill test and 24 hour holter examination. That would pick up any significant cardiac abnormality. It could turn out to be anxiety as well.
Feel free to discuss further,
Regards
Dr Vivek Mahajan
DM Cardiology