CF, I don't know how much you've gained since starting LC, but if you started Sept 1st, this is only the 12th day since you did a complete 180 on your WOE. I agree with the others that you're going to need to give this time for your body to recover, while you replenish the nutrients it's lacked for so many years.

About the IF - I think that's a great idea for once you start to feel truly healed, but honestly, other than upping the protein, I'd hold off on tweaking your diet any more right now. We often see good results with a combination of LC and IF, but because you're still recovering from 6 years of plant based eating, you need to give your body every chance to replenish those nutrients, which means providing the nutrients it needs, any time it "asks" for them, even if it's in the middle of the night.

(Those who do IF regularly please feel free to chime in on this, because this is just my opinion, and I could be completely off the mark.)