Shih Tzus

Hi need to pick a few brains my shih tzu bitch is on day 61 pregency this is her third litter ,normally goes to day 63 never normally shows any or the normal signs. Our other shih tzu had her puppies on tuesday and we have been told this could make Ruby have her's earlier?
These are her temperatures for the last couple of days
day 57 12.30pm- 37.9
day 58 4.30pm- 37.7
day 59 2.00pm-37.4
5.00pm- 37.5
day 60 10.00am-37.5
12.00-37.5
2.00pm-37.9
4.00pm 37.5
7.00pm 37.0
10.00pm 36.4
12.00pm 37.5
today day 61
7.30am 38.7
9.30am 36.7
10.30am 36.7
12.00 36.7
1.00pm 36.7
3.00pm 37.3
Last night she started showing signs of going into labour panting, shivering restless shes been off food for couple of days, and today she has barely drunk any water doesn't want to be left alone. Do you think she is close or do you think she will hold on until monday?