can someone help me out i have a bunch of questions?

1. i live in an aparment, there is me downstairs and someone in an upstairs… do i have to warn her? is there a way it can go through vents and somehow reach her??

2. what do i have to wash after fogging? i have a down comforter, how do i wash this? what about the mattress? all my clothes, even in the dresser need to be washed? should i take my curtains down and wash them?

3. what about other items, shoes, purses, etc?

4. what about sprays and borax powder? any experience with them?

i don’t even know how bad my problem is… i’ve never felt a bite or seen a flea… i have 2 completely indoor cats and one was scratching a lot and i took him to the vet and she took one or 2 fleas off him. i’m freaking out now. i’ve had that creepy crawly feelign since i found out. i dont’ even know how they got in!

thanks for any help at all on this subject.