Is my dog pregnant

I mated my dog 3 days in a row 31/2 weeks ago, I havent noticed any symptoms yet apart from her teats have started sagging a bit. They dont sagg individually they tend to hang from teat to teat. She also dribbled in the living room which she never does...

and there was a lump of discharge in it could these be signs that she is pregnant

prob she is if she's acting different

We just went through this with our Chihuahua. She didn't change much until around the fifth week and then her belly started to get hard and her breast did enlarge. We could feel the puppies moving when she was about 7 weeks old and they were born on day 60. They say it takes 63 days so she was a few days early. She started getting antsy about 11am and had the first puppy at 2 and then had two more about an hour and 15 minutes apart.

We thought everything went well, but then we discovered that the one female puppy only had part of a front leg on one side and no front leg at all on the other side.

Our first thought was to put it down, but then I saw on the internet that there are a lot of two legged dogs and they get along just fine. They are a week old today and should have their eyes open in another 3 days.

yes, our dog was pregnant and had puppies and those were the signs