My.5 week old puppy has worm I don't have mony for a vet what can I do.what kind of wormer can you us on a 5 week

Let me start by saying that the de-worming products your vet is able to provide for you are probably the best/safest method available to de-worm your puppy. However, I was once in the same position as you - My cat had a bad external injury that was starting to get infected & was making him very sick (weak/lethargic/etc...) & as much as I LOVED my cat, I just COULD NOT afford the $200 bill the vet would charge in addition to the cost of the Rx they would provide (about $300T).
So I went on the internet (LIKE YOU!) & searched for a solution - That is where I found out about "Colloidal Silver". *I do not sell this product & I do not believe all the hype you may see if you search like me, re: Colloidal Silver curing every disease and ailment known to man & beast!! BUT I DID believe the testimonies I found all over the web from pet owners who had used Colloidal Silver successfully to heal their pets; to your point THIS INCLUDED GETTING RID OF WORMS!!
I went to my local "The Vitamin Shoppe" (because they would have let me return the product if I was not satisfied!) & for about $20 purchased "Sovereign Silver" Brand "Silver Hydrosol". I cleaned the wound with it & put about 1/2 a dropper/day into my cat's wet food 2x/day & in a few days the wound was almost healed and they were back to their old self!! THANK GOD!
This product should not be used long term but I still use it when one of my cats get sick & it ALWAYS works. I have friends with cats & DOGS who have used it (per my advice) & they have always come back to me telling me how well it worked.
I hope that my answer is helpful to you, & that you are able to afford the $20 or so to purchase a good quality Colloidal Silver product & MOST IMPORTANTLY that your puppy gets better quickly!

Better go to a vet & have blood work done
so the vet can come up with a what the issue
is & how to treat it