Hey Abz, sorry to be the bearer of bad news, but sounds like you now have carpal tunnel on top of your SPD, me and you could be twins.
My fingers are swollen too, they swell up more overnight, making it difficult to bend and really sore, I'm also getting pains in back of hand which are nervy pains, so nothing helps them. I got splints from physio to wear at night time as I'm now struggling to use my crutches due to it.