nut allergy: Co-living with people who just met you, makes it difficult to always remember about your food allergies. If not properly cleaned, some of the ingredients you are allergic to, may have come into contact with surfaces. Sound production when nuts have touched specific areas.
When you are stressed, house should automatically produce calm sounds or light condition, that could help you calm down and force you into short breaks from studying.
Never been locked out by your flatmates. Notify if everybody is home/returned, so that people know when to lock the door.