I understand your fear. Although I've been out of my parent's house for many years, I remember back to times like this. My sister caught the sv once and was sick in the bathroom she and I shared. I just wanted to stay away from the house but unfortunately, I had nowhere to go. It was terrible. No one else caught it, but I was terrified. I even laid in bed all the next day with an upset stomach thinking I had caught it. I didn't v or have d but I swore I had it. Looking back, I realize it was only anxiety. I used to be much worse with my emet. For instance, I went to a movie at a movie theater once and someone was sick in the very back row. It ruined the theater for me for awhile. Then finally when I started going back, I would only go to movies that had been out for awhile so they wouldn't have many people there, I wouldn't sit next to anyone and I would only sit on the end of the row. I've kind of gotten over that now and seem to be a bit more over the fear of someone else doing it. Now I just worry about myself when I am around someone who I know is sick or when I feel n. Hang in there though. I know it's hard but know you are not alone in this.