Today I got stung by some nettles normal I just put a dock leaf on it which I did but then I had an allergic reaction and my hands started to blister so we went to the pharmacy and she gaves us a cream called Benadryl which is a skin allergy relief cream but it has not made a difference now five hours on it feels like I have constant severe pins and needles and little red dots on my hand..
Does anyone know how I can stop the pain ?
Thanks.

Try soaking them in water with some baking soda and meat tenderizer in it. The meat tenderizer will soften your skin and let the baking soda draw out the plant venom. It won't be an immediate fix, but it should help at least a little