I'm very sorry that this has happened to you, and so quickly. A diagnosis of MS can be based on just clinical signs -- all those things going awry with your body --and either an MRI or a spinal tap,
so since you've already had the MRI, and clinical signs are increasing, it seems reasonable for them to give you a "working diagnosis of MS".
The steroids are an appropriate treatment for an "acute exacerbation" -- for a patient with symptoms that are worsening and intensifying, like yours are. They are given to reduce the inflammation on the surface of your brain -- the myelin covering -- which is what is getting destroyed in people with MS. The good news is that they think you're well enough to be able to get this treatment at home, with the support of a home health nurse. Sometimes folks are hospitalized to have this done.
There are several medicines that could be prescribed for you for the long term -- those "immune system drugs" your husband heard mentioned. They are Copaxone, Rebif, Avonex, or Betaseron -- often referred to on lists like this as "CRABs", from the first letter of each drug. Rebif, Avonex, Betaseron are all interferon-based drugs. Copaxone is not. All of them are designed to modulate your immune system -- not suppress it or excite it, but try to get it to stop destroying the myelin (which is what is happening when you're having a flare, or exacerbation).
You're in the Las Vegas area? You should look in the phone book for the National Multiple Sclerosis Society -- there should be at least one local chapeter in your area, and they might have ideas about help for you until you're over this current flare. Or you can go to their web site, www.nmss.org . I think there is a way there to search for local chapters.
I can't help directly with your children, as I don't have kids. But I do know that lots of folks with MS -- when they're not in the middle of a flare, like you are -- go on to raise their kids, live their lives, and do OK. You will, too...but first you have to get past this flare.
Your husband should ask at work if they are required to adhere to the Family Medical Leave Act (I think there are some size requirements -- a company has to be of a certain size before they're required to abide by it). What this act does is allow your husband time off work -- without pay -- to care for you and the kids, without jeopardizing his job. There are restrictions on how he can use it -- using sick leave, vacation, that sort of thing first, then FMLA -- but if it's available to him, at least it would ensure his getting back to work without any problem.
You're certainly able to get a second opinion. But from here, it sounds like you're getting good care, and what your doctor is offering is appropriate for someone with MS.
Again, I'm sorry this is happening to you.
...I am not a doctor, nor health professional, and don't pretend to be one, here.....