Worst night ever. He wouldn't just lay down on or under the bed like he usually does, he was panting like crazy and barking and growling.
I went and let him out at 1am in case that was the problem but he carried on after he came in.
About 3 he started growling under the bed and woke up my baby... I got down on the floor to tell him to get out and as I reached to stroke his nose he bit me. Quite badly and it bled for a while.
(He has bitten once before, years ago, when my oldest DC was a baby and a strange man grabbed his face, but we immediately got a police dog handler round the house to help and he's been amazing since.)
I've checked him all over today to see if anything hurts and it doesn't seem to, the only new thing he has (which I'm sure is nothing) is a little wart on his tail.
He's a 7 year old cocker spaniel and we really love him. He's very restless even now and panting like crazy. He occasionally lays down and trembles 
He does need a haircut but
not desperately so, and it's not hot.
I can't take him to the vet by myself with a toddler and a baby but have booked an appointment tomorrow evening when DH would be here.
Ideally I want to take him now 
I'm so worried.