Puppy help PLEASE

Hi,
I wonder if anyone can give me some advice. I recently got a new puppy. He is a retriever cross and is 11 weeks old. I have two problems that I would love some help with.
1 - At night when he is put in his crate he barks and howls incessently- and I mean incessently. All through the night without a stop. I actually don't know how he keeps it up! This also makes it extremly difficult for me to go into him to reward and praise him when he is quiet as he doesn't stop! Is there anything I can do to resolve this?

2- Now this is the one I am more worried about. We also have a 20 month old dog, a flat coat retriever/collie cross. She is an absolute dote but is shy around dogs. If she meets them on the beach/walks etc she is fine and will play with them but other than that is nervous. She has become extremly stressed over the last few days since we got the pup. She is slinking around the house clinging to the walls so she doesn't have to go near him, is shivering and shaking and has gone off her food :( I knew it was not going to be an easy transition but I didn't think her reaction would be so severe.
Is there anything I can do to help her? I can't bear to have her like this and I feel so guilty that I have taken away her happy life. If she stays like this then I am going to have to try and rehome the puppy- a step I really do not want to have to take :(
Please please help.

Its all adjustment the pup should not have the run of the place as resentment sets in on the older dogs part. I had this worry when introducing a new dog last year but it wasnt fretting I was worried over it was the opposite! fighting. I was introducing an adult dog to the mix. but with restricting the time the new dog spent about he just blended in after a few weeks. use a puppy pen/crate or both during the day for the pup and keep the pup restricted to the kitchen let the other dog the usual freedom and lavish attention on the dog not the pup!! they will learn who is top dog whether it be the pup /the dog in time. but it takes time.

Its hard work alright!! I personally only used a crate for my last dog as I didn't really know enough about them. I used it as a place for naps for the dog. She was out around with access to it by day. I put toys and treats there and used to feed her there too. I think if you're open to the idea of having it in your room by night just for maybe 2 weeks. Having said that, I do have 2 cockers who think its their royal entitlement to sleep upstairs!! Never quite got around to kicking them out:-). Adult dogs I find are generally put out by pups for the first few weeks. This tiny thing flying at them for fun! But dont worry. They will set their boundaries in time. My german shepherd worshipped my cocker from the day I got her and happily let her chew on him. My other cocker despised her and would sulk upstairs until she gradually wore him down with licks and now he loves her too! One tip I used was not to make a fuss of the pup in front of the other dogs. Its group hugs all the way.

Things have now gone from bad to worse.
Crate training is coming along fine now. But our other dog is not.
This morning she went for the puppy and I don't know what she would have done if I hadn't been there to get him away from her She meant business. I don't know what to do and am at a loss as to know what is best for both dogs. Don't know if I am fighting a losing battle.

Can really recommend walking them. We used to foster dogs and walking was the best way to get them into the 'pack' mode. Dogs that could be ready to fight ending up walking either side of me without even looking at each other. Takes a bit of correction at the start of the walk but they soon get into it. Would suggest a good walk in the morning to calm the pup down a bit and then maybe your older dog wouldn't be as over whelmed with the pup. Make sure the pup is given clear boundaries too and doesn't over step the mark. If the pup is under control maybe the older dog wouldn't feel like they have to correct him?