so ive managed to overlook a pretty decent part in my plan for my house. i live on the top floor of my house (basically a finished attic) all by myself, the rest of the family lives on the main floor. All the guns in the house are in my gun cabinet which are in the room directly outside my room. i've always assumed that if i heard a noise i would grab my mossberg 500 (which is not locked up) and would proceed to check out what was happening, this is because the rest of the family is down there and about 3 nights a week we have an infant. ive always planned it happening with the door at the bottom of the stairs closed, i'd slowly make my way down and then stop and listen, and then based on what i hear, open the door and proceed to ensure the safety of my family. the other night we had an incident where i had to go and check it out, as i go to head downstairs, i notice the door is open. luckily nothing had happened, but my question is, what should i do if the door is open, because with the door open, if there is a BG who is armed i would totally open to a shot as i head down the stairs, and if i stay upstairs i could end up crying wolf or allowing my family to be injured. any suggestions would be greatly appreciated.