Dear Doctor. I Am 26 Years Of Age.I Was Around

Dear doctor.
I am 26 years of age.I was around 95 kg during my graduation.Then I started dieting and gym and reduced to 80 within 2 months.At that time my father was hospitalised due to blocks in heart valves.I was accompany in the hospital for one week.I suffered lot of stress and sleeplessness during that one week.After reached home I started anxiety and pain in my left hand  .asome times I felt the pain is radiating.I was depressed and when checked about these symptoms on internet it was shocking.At that time I joined for a new job and started regular exercises and gym, then I felt good.Now adays I am not regular in exercises and all due to my work and other factors.
the main problem now I am feeling is weight loss without dieting, always irregular heart beats, weight loss, anxiety,feeling pressure and all.I am very much afraid to tell about it to my parents ,please give me an advice &solution.