Welcome to HCM
We understand your concerns
I went through your problem description. The numbness
should be due to some awkward positioning of your hand during your sleep. I presume that the previous day, you were very tired.
Naturally body tries to overcome the numbness and pumps blood with more pressure. This clears the problem within minutes. The pain on the shoulder and hand weakness also can be associated with the awkward position.
So Please, there is nothing to worry.
Hope this clears your doubts. Available for further clarifications.