If you haven't got the time to go to a vet at this stage then I think the wisest thing you can do is NOT breed your bitch, until you do have the time and have put the proper research into it. Have you had the time to make sure all the relevant health tests have been done? (hips/elbows/eyes/CNM/EIC/PRA on both sire and dam) Have you fully researched the pedigrees?
If you think going to the vet for a blood test is time-consuming then just wait until your litter is 3 weeks old and is a full time job for you weaning and cleaning up after them....
I'm sorry, but I think this breeding plan needs a whole lot more thought than just chucking your two dogs together for a few days
