HEART ENLARGEMENT? :(

hi just want to ask help and opinions..

Year 2005 October, i suffered palpitations and been confined for two days in the hospitals. by BP then was 150/100, all of the laboratory test are normal except my cholesterol which is elevated.

Year 2006-2009, almost everyday i feel dizzy and light headed, ive been to a lot of doctors from cardiology, ent, optalmologist and have been to series of examinations, 2D echo, ecg, threadmill test, blood test, all is normal... my blood pressure that time range from 120/90, 130/80, 140/100, most of the time my bp is 130/90 but in the physcians office it fluactuates from 130/90 to 140/100...but then MY CARDIOLOGIST TOLD ME I AM NOT HYPERTENSIVE...
I am not convinced so i decided to consult another Cardiologist she ask me to repeat the exams 2D Echo, ecg, blood works and all of the result was normal again except my cholesterol which is a little bit high.. so she put me on simvastatin or cholesterol lowering pill. But I always feel DIZZY this years

YEAR 2006 TO PRESENT

I start a healthy lifestyle, i quit smoking, i start running and been to extreme mountain biking... i reqularly exercise and i dont suffer any chest pain when i exercise... but still i feel dizzy most of the times... My VNG test suggested by my ENT doctor revealed that i have right peripheral vestibular lost. But he gave me no pill.. By BP that time is stable at 130/90....

My exercise is tough during those years i bike 40 to 115 kms weekly.. i run 2kms almost everyday, i lift weights 2 twice a week.

Year 2010 i was diagnosed with anxiety problems

Year 2011 i consult again my cardiologist regarding my BP, and took again several exams. She diagnosed me as a hypertensive, my 2D echo was not normal indicating that theres a muslce build up in my left atrium she said because of hypertension.. but i am not convinced MAYBE it was cause by my chronic exercise.. any help? by the way she is my new cardiologist ....thanks

Will my enlarged heart muscle or LVH back to normal if i maintain by BP in normal level? or i will had this lvh for the rest of my life even i maintain my normal bp. Thanks