Welcome to HCM
We understand your concerns
I went through your problem description. I suggest you not to worry too much.
The finger crisscrossing and numbness
you felt might be due to muscular twiching normally happens during winter, using cold
water, awkward use of fingers etc. You are doing a good job as a caretaker and god should help you. Though you should not worry about any diseases, because nobody knows what the god has in store for you.
Please do not be concerned for unnecessary anxiety
causes mental problems. Don't be stressed.
Hope this answers your query. Available for further clarifications.