SF,
Some possible causes of giant platelets are vitamin B-12 deficiency, folate deficiency and reticulocytosis. The lower than normal pre-transfusion Hb could be the cause of reticulocytosis, as the bone marrow becomes more active trying to compensate. So, the question is why has your Hb dropped more than normal during this period? Possible reasons are an antibody reaction or infection. This could be a temporary drop if you have had a cold or fever recently. The heart palps are of concern and could be related to iron load in the heart. Faithful chelation is the long term treatment for this, but with heart palps, it is very important that you are taking calcium and magnesium together, along with vitamin D. Calcium imbalance can contribute to palps if you are not also taking magnesium. The two minerals control either side of the heart beat and if you take calcium without magnesium it can lead to palps.
Even though Ferrirpox is available in the US under a special program, it is not available as part of combination chelation. It is only available to those who have shown an intolerance to both desferal and Exjade. This will change once Ferriprox is approved, but until then, you must be aggressive with desferal if you wish to lower your ferritin level. There is some chance you may find a doctor willing to allow both desferal and Exjade together, even though it 9is not officially approved in combination. However, the fact that some patients like Masuma in Texas have been able to use combination chelation with these drugs tells me that some doctors are willing to prescribe this when it is necessary. Masuma had a big scare, finding herself in the ICU with congestive heart failure but with aggressive chelation using desferal and Exjade, she turned things around completely. By the way, she is also originally from Pakistan.
You should continue to use the herbs and also pay special attention to supplements, especially B vitamins, calcium and magnesium, with vitamin D. And of course, you need to get your iron load under control. If you would like, I can also put you in touch with Masuma. She may be able to advise you about the combination chelation.