I wouldn't wait for Monday. Worms are normal in puppies, but that is a pretty serious infestation and you are probably dealing with a number of types. Much better to take the puppy in, than getting something off the internet, or at a feed store.
I use strongid, I get it from the vet and usually start worming at 3-4 weeks old and by the time they go home at 8 weeks, they have been wormed 3 times, one of them by the vet, twice by me. I continue worming them every 4 weeks thereafter until they are fully immunized.
Jenna, RN CGC & Babs, CD RA CGC HIC
Heidi, RA CGC
SG3 Odessa, SchH1, Kkl1, AD
Ninja, RN CGC & Milla, RN CGC
Joy, Star Puppy, RN CGC
Dolly CGC & Bear CGC
Hepzibah & Hannah