Usually it will fluctuate up and down and up and down, gradually getting lower. Then it will usually stay low for a number of hours, maybe 12 or more, before climbing up to around 100 or so before whelping actually begins.
It sounds like you are getting closer.
Agree with watching all the signs.
Jenna, RN CGC & Babs, CD RA CGC HIC
Heidi, RA CGC
SG3 Odessa, SchH1, Kkl1, AD
Ninja, RN CGC & Milla, RN CGC
Joy, Star Puppy, RN CGC
Dolly CGC & Bear CGC