You're giving us centigrade temp when most of us are accustomed to farenheit, so in order to address your specific temperature concerns we have to go away and do the conversions first.
I've nearly abandoned temperature monitoring as confusing. It can go up and down for days, then suddenly bottom out, at least in my experience. I do monitor temp, but rely on that along with other signs. Most importantly, I stay very close to my girls when their whelping time is near, have all my emergency contacts on notice and the car outfitted with emergency supplies and ready to go in the event a hospital visit is needed.
Good luck. This is the most stressful part of being a breeder, IMO.
