Our Golden might be pregnant

Question
I have been trying to do some research, and I haven't had that much luck finding a lot of info on breeding.  We have a 4 year old Golden who was never fixed (we had intended on breeding her with our male golden who passed away last December).  We got a lab mix in January, and totally our fault, we didn't get him fixed in time.  Turns out the golden was in heat recently and they tied several times.  We tried to keep them apart, didn't know how difficult that would be!  The first time my husband witnessed them, it was Nov 1st.  By reading some of your prior responses, could she possibly have different due dates, i.e., more than one litter??  Or am I just reading wrong?  I don't want to take her to our usual vet, because they are very against breeding.  This was not our intention, but I will do whatever I have to do to find the puppies (if there are any) good homes and take care of them.  When do you think she would begin to look pregnant?  So far I'm not really noticing any changes.  Sorry to be so long...any advice would be appreciated!!

Answer
What I mean by that, is that she may have more than one due date. Say she was bred on one day, and then two days later. She would have two different due dates. She may go past the first date because she didn't take that time. This is only if the dog was bred on different days. If she was breed a few times on the same day, then she would only have one due date. She was bred on Nov. 1st, she would be due Jan. 2nd. Count 63 days from each day she was bred. If she was bred again on Nov. 3rd, then she would be due Jan. 4th. Am I making any sense? :-) Sometimes I don't think I do. It sounds good in my head, but reads differently when I type. I don't want to confuse you. My best advise would be to find a vet that is understanding to your situation. You may need a good vet if something goes wrong. She may start to show when she's about a month along. Some girls never show. Some do really fast. It honestly just depends on the dog. Good luck!