Hand Foot and Mouth disease which is a viral disease is commonly seen in children.
The usual period from initial infection to the onset of signs and symptoms (incubation period) is three to six days.
The illness spreads by person-to-person contact with an infected person's saliva, nasal secretions, fluid in the blisters, sneeze and cough air droplets etc.
It's not that infective in adults as they don't show any signs of illness even if infected.
Since you are an expecting mother in 3rd month of pregnancy, better you restrain yourself from your daughter for a week.
Next Steps
If you show any signs of viral illness consult your Gynaecologist immediately as any fever in 1 st trimester is not to be taken lightly.
Health Tips
Proper hand washing
Good personal hygiene
Drink adequate water
Disinfect you daughter's toys, blankets and other things which are used by her.