Sometimes doing something mentally and/or physically engrossing helps, like word or number games, doodling, sit ups. It's not a cure, but but if you can manage to focus enough on an activity it might take the edge off. Deep breathing & mental imaging (picturing something peaceful) are supposed to help as well, although they never have for me.

Personally, I think a lot depends on the reason your anxiety came about. If it's a security issue, changes to your environment might help; if it's a fear of being alone, talking to other people might help, if it's just your brain being screwy, medication might be the best route; etc.

I wish I could offer more advice, but if I knew how to fix it I probably wouldn't be here. lol Just try some things and you'll find which is most helpful by process of elimination. Best of wishes and keep us updated.