I've come back needing reassurance!!

My interview went well, I think it did! I did mess up on one question (he asked if I could do something and I had genuinely forgotten, so I said "it's been a while but I'm sure I will be able to do it". They kinda all laughed uncomfortably when I said that. After the interview it all came back to me and I was mad at myself for not remembering during.

They said they want to schedule a second interview with the person I'll be working with to see if I'm a good fit so that should be a good sign but my anxiety is telling me they're softly rejecting me.

Also because I sent follow up thank you emails to both people on the panel immediately after the interview and they haven't replied. Also because one of them asked me for a sample/reference paper of something I was talking about, and I attached it in the thank you email I sent. And like I said neither of them have acknowledged my emails.

I'm just really anxious.