I just want to welcome you to this wonderful forum.....
I'm sorry to hear of your struggles........ I noticed your post right away because I also have had problems with both my legs for 5 years now, but my problems are from pain issues......
When I visited your profile page I noticed you do not have any pain.
Do you have any other symptoms or changes that you've noticed? Only your legs giving out on you? That is a mystery.
Do you have anybody there to help you with your young daughter?
This must be very frightening for you and I am so sorry......
You've found a wonderful place for support however, so maybe that will give you some hope and a better outlook......others will be along who may have ideas for you.
For now, let me give you a hug

and let you know that there are many people who care. Hopefully you can begin to get some answers.
Caring
Rae