Overwhelmed by Moving Out (Social Anxiety)

So I'm finally moving out of student housing into my first own flat. Yesterday was the big part of the move, where we transfered all of my furniture and started building the kitchen. I have severe social anxiety and so even with only my parents, siblings and a few close friends helping I felt awkward the whole time. At the end of the day I heard a friend of mine talking with my sister about how "I only stood there useless and that I'm incapable of any social interaction." They were visibility upset and I don't think they were the only ones. For context: I'm 21 female not knowing anything whatsoever about building stuff nor am I strong enough to move any big pieces of furniture. I don't want to justify my behavior, because I know I could have done better, but in the moment I just felt so overwhelmed by the whole situation that I feel like I froze. I was, and I am still, quite hurt by the comment they made, even though again I think they were just tired and not ment it to sound that hard (I don't think they know I overheard it). That evening I messaged them again telling them how greatful I was for them helping me as a try to help the situation, but they practically ghosted me. I am basically spiralling down overanalyzing the whole thing and feel to anxious to do anything productive right now or to even just calm down and rest. What makes it even worse is that we all need to meet up again in a few days to finish everything, but even at the thought of that I just want to disappear. I really don't know how to move forward from here, so any help would be appreciated.

P.S.: I love my family, but they don't fully believe in the fact that I have social anxiety and just mark it off as me just being shy and introvert. Coming forward to them with my mental health as 'an excuse' probably wouldn't be very helpful...

P.P.S: English is not my native language so excuse any mistakes.