I am severely disabled and have gradually lost my mobility as my condition has progressed over the last eight years. I second asking your G.P for a referral to an occupational therapist, who can help you with fitting a stairlift, equipment to help you dress (eg to help lift your legs individually), wheelchair accessible doors, wetroom etc. I would also request a physiotherapist referral as you will gradually need a walking stick, crutches and then perhaps a powerchair. OT and Physio will work with you to help you be independent at every stage, but you will need regular reassessment. I would also ask your employer if they can organise an OT to visit your workplace to see how things can be made easier, for example, you may need a more accessible desk/ work area/ entrance/ bathroom as your condition progresses.
I would also consider whether your current home is adaptable for your future decline. Is there room to create a bathroom and bedroom downstairs? If you have critical illness cover you should be entitled to have your mortgage paid off. If your current home is not very accessible you may want to consider moving to a bungalow. OT can help you with this and they can advise the different requirements you may have as your condition progresses.
I want to send you so many hugs, it is so frightening and frustrating when your body betrays you and you lose your independence. You will be entitled to care, if you need support/ washing etc you can contact adult care department at your local social work department. They will not take your dc away, they are there to help support you including your role as a Mother.
Do contact your local M.S Society, they often have local treatment centres, where they offer alternative therapies like reflexology/ hyperbaric oxygen therapy and physio. Using these facilities will give you the opportunities to confide in other M.S sufferers. They should be able to help refer you for counselling, which you will need support with. I also advise that your husband/ partner reach out to your local carers organisation for support and help to adjust to a caring role. M.S is a bomb that basically blows your family and relationship up and you need to put it back together, when you do, it is not the same as it was before but can be stronger and just as loving with the right support.
Going through the process of arranging care with social services can be a minefield, my biggest tip is to look up your local advocacy organisation, there are wonderful advocates who will work with you, your dh/ partner and be at every meeting with ss to help you get the care package that you need. They can also help make sure you are getting everything that you are entitled to.
If you are on facebook, look up groups for people with M.S it can be so isolating and you see fear in your partner's eyes and don't want to burden them with your own fear. I held an awful lot in, but having a group online that was full of people in my situation going through or with experience of going through what I was so helpful. Only someone who has already tread your path can understand the depth of your worries and fears. Let yourself feel what you are feeling, write it down in a diary or on a piece of paper and burn it, rip it up if you need to. Punch pillows or scream into a pillow, let your rage and the unfairness of it all out, or you will end up snapping at your dp or kids. If you find yourself slipping into a dark place or overly anxious, don't ignore it, contact your g.p as anti-depressants and anti-anxiety meds can make such a difference! Try to think of your aids as things that help you to do things, rather than things that you have to use because you can't do something. Every new aid can bring you further down, or you can accept it and use it to remain as independant as possible.
I advise that your dh and yourself if you can both have a counsellor or someone to confide in, caring for your loved one can change the dynamic of your relationship. If you can have an outlet to your frustration outside of your relationship then you can try to face each new turn with humour. Don't let your dh/p take on too much of your care, you are entitled to care, so take it, it makes such a difference having someone else care for you, allowing you to try to hold onto being lovers instead of carer and cared for. My dh still cares for me outside of the hours my carers are here, but he is not under as much pressure. We have a great intimacy between us (he had to give up work to care for me and our two dc) more so since I have had carers who take care of my washing/ showering/ dressing/ toileting needs.