Hi Lollipop
The first thing is, well done, for getting there. Also, whatever anyone says to you, it isn't going to stop the anxiety, so, take deep breaths, hold, let go.... distraction is good, so every time you feel something starting up, get up move around, try to stay as calm as you can, I find the more I fight it, the less it gets, if I give in to it, I wouldn't leave the house, so, I keep fighting, it seems to completely overwhelm me if I don't fight.
Nothing bad is going to happen, all your family are there, maybe, you should try and get five minutes away, so you can deep breathe, or gather yourself together, I do that, I give myself a good talking to, shake myself down, and carry on.
It's not easy, and you have my complete sympathy, wishing you well,lollipop, and hope you have a great time....xxxx