Fiona - well I like your train of thought...the most powerful all-round-system-balancing therapies I know of are the Trad Chinese Medicine +/- acupuncture - I think either or both of those in combination could be quite valuable...it might be interesting to speak to a TCM practitioner and find out what they have to say about it. If they've never heard of SPD/pelvic instability then run a mile, but if they experience with it, they could have some valuable therapies, kwim?

Good luck - you can do it! You will be so much better prepared this time. xxx