Hi lmm...you seem to still be having such a hard time. Maybe it's worth your while to get back to your gp and take them up on the offer you mentioned in another thread for some time with a counselor or psychologist. .. plus some meds? I don't mean to be rude. .. I've been through counseling and stuff myself so I firmly believe it's very helpful when struggling. Our perhaps you could get the sleep lady back you had?? Might be helpful again?
As for the formula issue. .. just from my experience having been through so many different formulas with my 6 month old. .. you really need to stick to one for up to 2 weeks to get them used to it, unless of course there is a major reaction (eg my dd threw up every feed of soy formula after only three so I didn't stick with it). There will always be a period of adjustment I have found. So if you can stick to one for at least a week or get back to your gp for some advice.
Anyway. ..I hope things really settle down for you and you can get support. ..I've never heard of panda that was mentioned by pp but it sounds like a great option too.
I really do hope things get better and you can enjoy your ds.