How to complete the first Jhana?

I have read once you have reached the bliss stage you should take your focus off the object and on the blissful sensations and hold it. Then in time you will be in Jhana. But i also read in other sources you should just stay with the object and one pointed focus will rise that way. Which is it? This confuse me. I've reached bliss i kept focusing on my earth kasina but before i could fully enter the first jhana i felt my breath fading and it scared me out of my mediation. So i don't know if focusing on my object would have allowed me to reach jhana.