If a head gasket fails, it does not correct itself.
It can fail in different ways.
The leak could be into one of the cylinders, which when the engine is running would overpressures the cooling system, blowing water out of the expansion tank, you may get a lot of steam from the exhaust.
The head gasket can also leak into the oilways this will result in water getting into the sump, classic indication being emulsified oil on oil filler cap, it looks like mayonnaise.
Being that the car is no longer losing water, the head gasket is probably ok.
You could have experienced a partial air lock in the cooling system that has now cleared, (I had this trouble with my BMW, very difficult to bleed)
I hope everything stays stable.
Wotan