At least you had a blow to lose… After two weeks I’m still trying to find mine. 
Sigh. I can get the first register scarcely breathing into the flute, a lovely deep resonant sound it is too. But the second octave remains elusive, unless I blow my brains out and then all I get is hissing and spitting noises. Exercises like “long notes jumping octaves”? I wish…!
Still, I shall persevere. I have whistles a-plenty to learn the tunes on and time in the evenings to try and teach the lips (*&%&$^ing stupid lips!) to ‘remember’ what they did the last time I actually managed a 2nd octave G that didn’t threaten the windows.
What really gets up my nose is, the day my flute arrived and I first hefted it into position, I ran straight up a 2-octave arpeggio no problemo…then I made the mistake of taking a breath and that was it gone for a burton. :roll: