@sophiarose, your mention of heart issues tipped me off to let you know about cardio-oncology.

Mayo Clinic offers expertise in addressing heart problems (called cardio-oncology), potential or current issues. The Cardio-Oncology Clinic (https://www.mayoclinic.org/departments-centers/cardio-oncology-clinic/overview/ovc-20442193) evaluates people prior to cancer treatment and patients who have experienced side effects due their treatment.

You might wish to inquire about a consult with a cardio-oncology specialist, although it sounds like you're already in good hands. Just thought I'd make you aware of the specialty.