Ok I am new and have a HUGE problem.. Heck.. I don't even know if I am posting this question right :0/ so here it is — We have a yorkie that had her first heat around the 1st or second week of September, I didn't even know she was in heat till I noticed she was Very swollen, I have a 7 year old male Shihitzu (Harley) that is not fixed (MY BAD) and when I noticed Kisses (Yorkie) was in heat, I did my best to keep them seperated, Obviously It was to late
Took Kisses to the vet 2 weeks ago they took an xray of her and saw nothing, but I know she is pregnant, she has all the signs and I can even feel the pupps moving in her belly... I suspect she is due 1st or 2nd week of November, but I am afraid for her, she is so small and young, I see her nipples are now very swollen and she licks her self as if she is trying to clean herself in her private area

can someone tell me what signs to look for that may tell me she is starting labor or when to expect that she may be?
Please help a worried grandmother thanks much