I felt the same when I started waking up early... I then realised that I was breaking the inertia in body to be lazy.. after a few weeks that became my routine and I am so glad I did that, because now I seem to find that extra time for myself, which I otherwise would have wasted.. And as for the reason to continue.. Ask yourself, If you go back to your old routine, would you be any better? And what can you achieve once you start feeling active with this new routine of yours..
And congratulations for your wedding ☺️