Hello. I recently got a dog, her previous owner said she was just over weight, after a bout a week, we realized she is pregnant. We ave no idea how long, but her teats are leaking milk, clear discharge, nesting, etc. But i took her temp yesterday at noon and it was 99.8 then i took it at midnight it was 98.0 and i took it at noon today and it’s back up at 99.3. Why is it fluctuating? Is this normal, and there are still no puppies but we can fee; them inside her.