Brief Answer:
Read below.

Detailed Answer:
I read your question carefully and I understand your concern.

I do not think the numbness is related to the MI, at least it is not directly caused by it (while they have common causes).

The symptoms seem typical for polyneuropathy, meaning damage to peripheral nerves. It can be due to many causes, the most common one by far is diabetes, so since you suffer from it it is most likely your case as well.

However the diagnosis should be confirmed, for which a neurological exam is needed (to check for signs like loss of reflexes, loss of muscle strength and sensation etc) as well as a test called ENG - nerve conduction studies. Diabetes control is the best treatment. At times when the abnormal sensations are too bothering some medication like gabapentine to alleviate that may be used (but as I said first the diagnosis should be confirmed).

I remain at your disposal for other questions.

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