Twinkle,
Been there done that and got the tee-shirt. Just recently I started to get physical feeling of overwhelming anxiety, never felt like it before and got myself into a state in a very short period of time.
I am now feeling a lot better by just recognising that dealing with the symptoms of menopause can be a very daunting thing because the symptoms can be scary, like feeling we have lost control over our own bodies.
My advice is to just try and roll with it, see your GP if you are really worried about a specific thing, but I stepped aside from my feelings and looked at things objectively. I came to the conclusion that I had been catastrophising everything and got things completely out of perspective. I still have a feeling like I am on an adrenaline intravenous drip and I am going to see my GP and ask if there is anything I can take to get on top of this (not benzodiazepines though) and get me back on an even keel again. But I actually feel "normal" again today - I took time out by myself and looked at how I could stop it i.e. :- "my thoughts going around and around in a loop of anxious thinking".
Try an focus on the details of your forthcoming wedding (congratulations by the way) or something else which forces your mind to think about something other than your fears. I know it is easier said than done but honestly it worked for me. Have a look at websites about mindfulness, some sites have downloads of meditation exercises which might help. The important thing is to get absorbed in something other than your anxious thoughts.
You will be fine but I completely understand how miserable it is, but it isn't forever and you can and I am sure will get out of the catastrophising thinking. You are missing all the fun of looking forward to your wedding day, it doesn't have to be this way does it? Its only thoughts and they can be changed.
You will get lots of understanding and support here and its always good to know there is a safe place to come and vent
All the best.
LL