[Gumlegs]

Medical Science had no treatment for my illness (this was 1950's), and no explanation for the miracle that saved my life.

Argument from incredulity.

[Dimensio]

Argument from incredulity.

Also false dichotomy. Assumes that either an explaniable natural phenomenon or divine intervention (I assume that is what is meant by "miracle") is responsible. Does not consider the possibility of a natural phenomenon for which no explanation is known based on current understanding of medicine.