Oh you poor thing Magpie .. must be hell.
As suggested cool compresses and calamine lotion does give some relief/drink plenty of water and also a general painkiller can help. Moisturising sounds good if not too painful. Don't pop any blisters !
Get down to your local chemist tomorrow .. they will know all about this .. particularly after this weekend. After that, just time I'm afraid.. another day and you will feel much better... X