Char,
Just take a deep breath - it's gonna be just fine.
I went through the same thing in October of last year. I was stressing out, looking at everything that was available and trying to find something without stairs.
I was wearing myself out and told myself that if the condo I was going to look at was nice and he would allow me to lease it then I was taking it - stairs or not. Well, it was nice - brand new but with stairs. But, no yard work which was a plus. The man was willing to lease it to me and I left with a rental application and he said he was going to take the ad out of the paper.
On my way home I passed a "for lease" sign at the front of a neighborhood and thought "what the heck, I'll take a look." Well, this house was perfect. A ranch with a flat driveway and small yard. Not a stair around. And a huge master bedroom with a bathroom that had a step in shower and separate spa tub. Enough room for a wheelchair, too, if I should ever need one. Just perfect in every way. And the man who owns it said "no dogs, but cats are just fine". What???
A man who loves cats!!! I couldn't believe it! He didn't even charge me a pet deposit!
And to think if I had not gone home that way I would not have seen it! God was watching out for me - like there is ever a day when He doesn't??!
Anyway, I called the other man back and told him thanks but I had found a place that better suited my needs. He understood and I moved in this new house the first of November.
I didn't need to wear myself out worrying. God already knew where He wanted me. And He knows where he wants you, too. I have no doubt that you will find a nice place and one that suits your needs.
I will keep you and your DBF in my prayers that God will lead you to the home He wants you in.