Joy,
Just to give you a bit of confidence:
I'm 52. The last time I got on a bike before this month was 36 years ago as a teen!!
I fully expected to be wobbling and falling all over the place.
I borrowed a friend's bike and got on, started down the back road and to my amazement I did not wobble too much or fall! They say you never forget, but I hadn't believed it til then.
Anyway, she lent me her bike for a few weeks (my very OWN bike is now on order) and I practiced circling etc in empty parking lots for a few days. Then I started biking around our small town. Then I did a hilly 18 mile trip, and a level 20 mile back country roads/highway trip. All in a couple of weeks!

I'm still not too agile yet but I'm getting better every day. Don't worry, it'll come back to you!