I was at the interviews on 2/4-2/5. I got an unofficial acceptance from my POI this past Friday. She says the official acceptance will come within the next few weeks. I know it sucks (I am in the same boat at a couple of other schools), but I would probably expect a rejection at this point. It is possible that you may be on a waitlist. You can also DM me, and I can tell you whether your PI had candidates at the interview day.
The USC interviews were last week 2/4-2/5. They told me they want to make their decision by the end of this week. (Meaning on Friday- not earlier in the week).