Damage is usually caused by having a high ferritin for a long time untreated. I empathise with your fear. I would keep pestering your dr/heart specialist for treatment of your symptoms if I were you.
Try eliminating sugars and starches (that means potatoes, pasta, rice, too, and any vegetable grown underground, although turnips (urk!) and carrots are not too bad. Starches convert to sugar and cause fatty liver. I have also found research that reveals that we with HH do not digest sugars and starches, so perhaps eliminating them may reduce your abdominal pain. Find a bread that is mostly seeds. I am comfortable with one slice of Burgen soy & linseed bread.
Also we are prone to Helicobacter Pylori which causes abdominal pain, including ulcers. I was diagnosed with 6 duodenal ulcers. I don't have to take statin tabs nor do I have high BP. Ask for a test for this.
One of my hip replacements was botched so I suffer daily pain from that, sitting, standing, sleeping, walking. After 29 years, fatigue is still a problem for me - I have very short days and have to be horizontal by 7.30pm, sometimes earlier, if I have had a strenuous day. Just an outing floors me too. Memory is stuffed and I lose words so bad I am waving my hands about with no words coming out. I am not as bad as I used to be. Learning things used to come easy for me, now I find I cannot read or listen and keep focus, and I am trying to learn French. I was forced to give up work, which has made life easier, plus my husband being diagnosed with HL forced the issue.
We are also prone to cancer and I have had 2 tumours removed, one deadly, one low level, and a large melanoma. I have to keep being monitored (mri every 3 months and body scan once a yer) for the deadly one, and because of all the medical appointments we (my husband is H63D/H63D and is in remission for Hodgkin's Lymphoma) have, I have been lax on those checks. Plus a tumour on my pituitary gland which seriously messed up my hormones for 6 years until diagnosed. Iron does get into the pituitary gland via the hypothalamus where it also causes problems.
One good thing is my liver was unaffected, I don't have diabetes, nor fatty liver (must be the sugar/starch elimination I have been doing for years - not strict of course, I have to have a taste or two of my husband's cheesecake!), nor insulin resistance (just been tested). I just don't buy the offending foods and have them in my house.
Another affect of sugars and starches have on me, is almost immediately after consuming it I feel like a truck has hit me, I slump, slur, and want to become horizontal - the floor will do! Geez, I can drink a glass of red wine without those affects. A couple of weeks ago, I ate a whole white chocolate and cranberry (large) cookie and these symptoms occurred just to remind me to not do it again.
Good job I am not celiac - the results would have been disastrous. Besides there are good outcomes from eliminating sugars and starches - I found my waist again!
There is other stuff but it gets rather boring.
Anytime you want to find out if HH might cause a problem, google "...... and iron overload". You will get more research saying iron overload rather than HH.
Vit E and CoQ10, I found in some research to be beneficial for people with HH. They supposedly help with damaged mitochondria. CoQ10 is also good for heart problems - heart specialists know this, and lately on the news, drs were saying CoQ10 is helpful for people with diabetes.
Ask for your Vit D and B12 to be tested. Deficiencies in these can cause major problems. If deficient, buy a practitioners brand of Vit D3 drops, have injections of B12, and also buy a practitioners brand of CoQ10. You are wasting your money on cheaper brands.
I hope all this info helps you. It is gained from years of self experience (and my husband's) and reading research.