Welcome to DTP
@Stacey sue - I am sorry that you and your husband are going through such a distressing time.
I went through something similar with my husband. When he was first sectioned I felt guilty too - but the sectioning was a necessity due to the episodes of violence he had started to display towards me and our son.
I was in a very fortunate situation in that I was able to be with him many hours every day for the whole two months he was there. Due to that fact alone, I managed to continue to support him to shave and to guide him in his own personal hygiene - and I was able to make it clear to staff that they were not to automatically put him in incontinence wear as he was not incontinent.
I was so grateful that I had that amount of time available to be by his side because he would have quickly lost his abilities without my constant input. So many in there were not in as fortunate position as we were.
After two months and many tweaks to medication, the doctors eventually got my husband to a stage where he was able to return home to us - the aggression under control.
We enjoyed another two years at home together before the medication stopped working and the next crisis arose - this time displaying as aggression towards me and our daughter.
However, by this time he had progressed a lot further into the disease and no amount of tweaks to medication, nor me being constantly by his side, were enough to make a difference - and, after several months and further rapid deterioration, it was agreed that a nursing home would have to be the next step.
Having my husband sectioned for a second time absolutely broke my heart and, like you I felt guilty, that somehow I had let him down. However, I also knew that my husband would not have wanted to be a threat to either me or our son and daughter.
I have no doubt that your own husband would want nothing less for you, that he would want you to be safe - so please do not feel guilty. We find ourselves in these situations quite beyond our wishes or our control - all we can do is be their voice to make things as good as they can be in each situation.