Hi tanja, that sounds like a whole load of grief you don't need right now and can't be helping, sorry to hear you're in that situation.
We have 3 dogs, unfortunalty the eldest, a Staffordshire Bull Terrier needs to be put down in the next week or so, we got her as a rescue dog 8 years ago and she's been amazing but was diagnosed with cancer 2 years ago and now has 2 big seeping tumours on her leg and at the base of her tail and is visably unhappy now, spends most of her time sleeping and you can see she has pain when she moves. Very sad, she's the first dog I had and the first one I've had to let go too so feel for you.