My Bitsy had eclampsia twice with her litter. The first time she got it was was when the pups were around three weeks old if I remember right. I felt the same way you do....ended up trying to let her nurse some because the pups were not doing well with me hand feeding them....then she got eclampsia again...scared me to death because she looked like she was going to die. After the second time we took the vets advice and didn't let her nurse them anymore. I'm not a breeder but I feel your pain
Hopefully a breeder with more experience will post some advice for you...or you can do a search on this board...type in eclampsia and it should pull up LOTS of info for you. Wishing you the very best outcome. Handfeeding puppies is not an easy task!!