Like you I was surprised by high ANA+ reading, but my FS did not put much importance on it. However given you also have FVL it might be worthwhile getting more testing done for Natural Killer Cells and further blood testing by a hematologist. I have two blood clotting issues, high ANAs and these combined may indicate you have a higher change of having elevated or more aggressive NKC.
I would recommend reading Alan Beer's book 'Is your body baby friendly?', when I read that it was like ticking off a list of all the things that I had which
my FS didn't believe in despite our diagnosis of "unexplained infertility".
Good luck and lots of