When can I sleep normal after an FUE beard transplant?

Beard hair is a genetic trait. You should not feel ashamed about the way you were born.  Find a new group of friends who wont judge you.

Thank you for your question. I do not think Doxycycline or Retin-A will affect the hair transplant procedure. Please talk to your Hair Transplant Surgeon in addition to your Dermatologist. All The Best !

Dust exposure in a normal sense should be fine. If you have issue or concerns it is best to follow up with your doctor.

As you rightfully state: "it does depend on seeing your doctor since everyone is different".  In general you need to wait to see the transplanted hair grow out.  This takes 6 to 12 months.

It is normal for the skin to get red and irritated post facial hair transplant. This phase typically lasts about a month and does settle down naturally. If it does not steroids and medications can be considered to settle down the inflammation.

Moustache and beard hair (facial hair) is a secondary male characteristics that starts with puberty.  It is also genetic in nature and some men cannot grow a full beard or moustache.  There are no creams to make hairs grow.