I don't know what to do

Hi, I'm 17 and in college.
I've been having counselling for a couple months now for a 6 mnth+ depression an anxiety issues, but my panic attacks, although not so often as they were, just seem to have gotten worse.
I just completely freak, I'm stuck to wherever I'm sat, not daring to move a muscle, and then almost subconsciously I will just leave.
A total 'flight or fight' thing. It happens on the bus, on my way to lessons, But now it's happened so that I can't get to counselling
And I don't know what to do.
Becausebefore I would find myself going home, on a bus or walking or whatever- just trying to get home
But today, home didn't feel safe. I don't k ow why but I just didn't feel like I had a safe place to go,
So... Somehow I'm at the hospital. Which is, I don't know how far away, but the past couple hours are a blur.
Im Not IN hospital, but in the cafe. Having a cup of tea and trying to breath and generally calm down.
But I really need advice, because I just feel at such a loss now.
Not just, what to do now (get on a bus, call my mum etc-)
But how can I get to counselling? Or into college and my lessons
I don't understand. Because today i only had english, and i love English! I understand english, my lessons my teacher, everything should be fine,
So what's wrong with me?
And how do I fix this?! I hate crying on the bus and in cafes, I used to be so independent! But now as soon as I'm on my own I get panic attacks and feel like I'm going to just shatter to pieces at the smallest thing.
Ugh, just, if anyone has any ideas to what I should do, now and in the long run, it would be greatly appreciated,
Thanks,
Lucy