goodness, that's not a desirable way to feel about going back to work!
i am off myself at the moment, and likely to be so for around 3 months. i also work for the nhs, and have had the opposite experience so far! my workmates have been texting and calling, chatting on fb, and some have even been to see me even though i live 'out in the sticks'.
it is at these times that you need the support of those around you, and i am actually missing seeing my workmates, its such a shame that you can't feel the same due to their attitude.
i hope it resolves for you!