Did Jesus have a follower named Thomas?

Yes,he did.
Did Thomas write of Jesus?
Possibly Gnostic text.
His own Gospel was omitted.
He was doubtful in the Gospels.
His own Gospels sheds new light on Jesus.
We miss the point when we see not the big picture.

According to John 21:25
And there are also many other things which Jesus did, the which, if they should be written every one, I suppose that even the world itself could not contain the books that should be written. Amen.

So we have only so much of the story of Jesus.