Got a septorhinoplasty on 09/11 on 13/11. I got a heavy nose bleed which was going down my throat, continued for 10 hours?

The dr came and packed my nose and it stopped after 10 hours, the following night my nose bled again but this time didn't go down my throat. The bleeding has not occurred since. I am getting the cast and packing removed tommorow and I'm so scared of re bleeding , I don't understand what has caused this and if maybe there has been a complication with surgery? The dr hasn't given me an exact reason as to the cause of the nose bleed. Help scared and worried

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