I understand your frustration.
Penile pump an ring are the only nonpharmacological safe option for you.
This should be tried first.
If no improvement, then you can consider local prostaglandin option.
Alprostadil is available in pellet forms ( Muse) to be inserted into the urethra just before sexual activity.
The systemic side effects are much less and considered safe even in heart condition.
This can be discussed with a urologist.
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