Yo-yo'ing

After 8 months of TTC, I've relaxed my sway massively, and I'm now only really left with weight loss and diet.
I only have a few months left to try before we have to take a break for personal reasons, so we are going for it, hoping for a BFP in the next 3 cycles including this one..
So, over Christmas I was off the diet, I ate a lot. I gained 7lb in few weeks after losing 40lb over 6 months previous. Ive now lost most of the Christmas weight eating very little for the last week.
Got a positive OPK last night so expect to ovulate today or tomorrow. We BD'd last night and night before and probably will again tonight.
I'm wondering what effect a short term break from the diet and weight gain would have after 6 months LE and weight loss, and whether strict diet and quick weight loss in the week before O would have any effect.
Nothing we can change now, just curious.

I think yo-yoing may even sway a little bit pink.

After 8 months, you should never skip a month anyway!!!!