Hydrangea Help!

Hydrangea Help!

Hi guys, A few weeks ago I got given a really nice bright blue Hydrangea as a gift. It was perfect when I got it and now... not so much. I waited for a few days to plant it, I found a spot, prepared the soil with some compost and fertiliser, cleared out any weeds and planted it. A few days later it was really droopy and not too healthy looking, so I watered it and it seemed to be happier. Now though: The flowers have gone a bit brown and every day when I come home from school it seems a bit droopy. After a shower of rain it picks up but that seems to be temporary. Not sure what to do now... should I move it? Is it too late? I'm in the UK for people wondering about climate. Its past the last frost and the weather is getting warmer.
pretty in pink!

pretty in pink!

update

update

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Corners of My Room.

plant id

plant id