Hey AVW, welcome to the forum!
I'm curious how everyone manages their cheat days. I lost 10lbs in three weeks before taking my first "cheat" day. I ate an entire gluten free pizza from Pizza Hut, but it spiraled from one cheat day to three straight days of overeating leading to +4lbs.
I will share with you the limited wisdom I have. I don't do "cheat" days, just don't. To be fair I have only been on this diet for about 2 months but so far I have not broken the rule and it seems easier not to as time goes by. Not to say I don't sometimes eat a little more than planned, or plan to eat a little more when I am out to dinner with others, but the key to that is the "little". I am getting better at figuring out how to limit my calorie intake while socializing, it takes some experimentation and work. If (or maybe I should be realistic and say when) I stumble my plan is not to beat myself up or feel a lot of regret for doing it, but rather to make sure I stick to my plan going forward.
I think you are exactly right to say that one "cheat" day can spiral to more, that is what happens with me, I know from lots of prior experience. That's why in my plan I just say no. You may find others with differing opinions here, and there is no right or wrong answer on this, there is just the answer that works best for you. You will have to figure that out.
And a good way to figure things out is to start a diary. Read others' diaries and posts to get a sense of how things work here, then start your diary and tell us more about yourself and your goals. You will find lots of smart people with good advice and support that way.
Even losing 6 lbs in 10 days is pretty impressive and if you get back on your diet those 4 lbs will come off.
Best of luck to you.