My thoughts, if you are happy with how you look just push through.
If you don't like how you look then tidy up your diet, and if still in doubt or whatever, do some cardio.
Brief related story, in my first six months of training (just over 2 years ago now) and eating I put on 10kg, sure it wasn't "clean" but I didn't give a shit cause I needed to force my body to change (a decade of cardio based training requires drastic steps). Weirdly, for having been pretty fit only 6 months ago (cardio went bye bye), I felt out of breath walking up stairs etc, but I just pushed on through and got used to the new bodymass being added. I didn't 'recomp' for another year when I had to make sure I fit a few clothes and looked tidy for my friend's wedding photos.
Now, I'm sitting at a happy +18kg from baseline in a little over 2.5years and haven't regretted a choice yet (apart from the ones I listed in the biggest mistake thread, but lets just pretend they don't exist).
Could I have got here trying to go up "clean" and worrying about that initial shock on the road (running out of breath), I honestly don't think so. The only time I did think the 'dirty mass' was getting away from me was the wife complaining about my sudden snoring onset when I went through the 100kg barrier (just prior to my planned recomp anyway).
Moral to a long-winded story...JUST PUSH THROUGH.