Struggling with Social Anxiety at Work

hey lovely people, I suffer pretty badly with social anxiety. it's been really bad lately to the point I've had to ring in sick this week because there's so many people in work as we're training students (I work in a vet hospital). I get overwhelmed when theres too many people around me and it triggers my anxiety so I have panic attacks. I've also been accepted for a new job role and they're all super lovely people. At my current role, ive been belittled, berated, deflated and defeated which has really not helped. I'm an RVN and a good one at that imo, but some people at my job don't think that. don't know why I'm posting, I think it's just for venting but any advice I'd be greatful for.