Relax my man. I was diagnosed with HBP which ultimately led to LVH although I don't recall the percentage and measurements of the enlargement. Im in my 50's and this was later determined to be work related so workers comp covered it.
I've been on TRT for several years, physically fit albeit alittle over weight, use losartan for HBP, work out regularity and cardio atleast 5 to 6 days a week. I'm active outdoors, hunt, fish, motorcycle ride and have sex like a teen....lol
I said all that to let you know that unless you find a dr that says you need immediate action and rushes you to the hospital, sit back and enjoy your life.
I had an enlarged heart probably for several years and didn't know it. LVH is much less dangerous and more normal than you think, if it was RVH then I would worry. TRT NEVER came into question and NEVER played into the equation by any of the doctors I saw or currently see.
Keep your HCT under control, take your HBP meds, eat your veggies and say your prayers like a good little hulkster and you'll be fine.
Personally I would rather have 10 years of quality of life than 15 years of feeling miserable if that was a choice.