Cats and wasp/bee stings

Milly is almost 1 (16th Sept) and she batted a wasp or bee today which stung
her on her front left paw. I saw it happen but it was so fast I didn't see
whether it was a wasp or a bee.

She shook her paw several times very fast and ran to the patio and then
frantically licked her paw. I inspected it but didn't see a sting left in
there. She didn't cry and she could walk on it, although she did hold it up
occasionally.

After about one hour, it had swelled so much that her paw looked like a
boxing glove and she continued licking it.

I rang the Vet for advice and they told me to bring her in straight away if
she seemed distressed. She seemed a bit sleepy to me so I took her in
anyway and they gave her an antiflammatory injection (x2)?? after a thorough
inspection.

She seems fine now and the swelling has gone but I asked the Vet if cats
could suffer Anaphalactic (sp.) shock, like humans. She said it wasn't well
documented but it's like humans, if they get sensitised to stings it could
happen.

She did advise me to bring her back if I was at all worried but she seems
fine and has eaten as normal this afternoon/evening.

Poor baby, she's sleeping now but I am still worried about her. Has anyone
got any experience with cats and stings?

Thanks
Karen