Soclose, I don't think it matters too much. Dr Sher says intralipids/ivig at least 10-14 days before embryos transfer is best. You could post a question re possibly doing the intralipids again on Dr Sher's blog (haveababy.com) and he'll answer it in a day or so - if you don't get anywhere with G! Good luck!
My FET has been pushed out thanks to thin lining too. I'm scanning again Tuesday as well, I'll have my fingers crossed for you.
Hope your week is going well ladies.