Your vet should tell you when it will be ok, but normally they say 2 weeks after the second injection, so that the vaccine has time to work and the pups imunitiy is up
I know what you mean and it gets hard to keep them in your arms when you go out they do get heavy don't they!
but sorry 2 weeks is what they reccomend you have to let the pups immunity come back up to normal other wise it could pick up something from another dog even if it's been vaccinated against it
I have always been told one week after the last jab - but provided you don't put her down where the local dogs all pee, then you should be ok to take her out now. I'd rather they were socialised (i.e. get used to sights/sounds etc) than be shut up at home. Just use common sense and only take her where there are no dogs.