Don't apologise for "moaning"....this is a support forum .....full of like minded people who all want to walk together along the long and winding road that is dementia. One step at a time is the best any of us can hope for.
Try and find the courage and strength to ask for practical help. There are both statuatory and voulantary organisations that can help. Start with your GP - you cannot continue to support your husband if you are physically exhausted and ill.
If I remember correctly you have been down the road of asking for help several times and not getting much of any use I do remember very well what it is like when the carer becomes ill or very over-tired