Flea problem please help

So we have a 5 month old Shepsky. The first few week we had him were fine, itching here and there but the vet told us that was normal for double coated breeds, and he was on flea medicine so I wasn’t too worried . But the past 2 weeks or so I’ve found a LOT of fleas on him. Like up to 20 at once. He’s on flea medicine recommended by the vet, we’ve treated our front and back yards, sprayed pesticide in the house, given him dawn baths, baths with normal flea shampoo, gone in with a flea comb (when he lets us). I’m at my wits end and I feel so bad for him because he spends more time scratching than anything else. We’ve done everything short of flea bombing the house, which I’ve suggested but there’s too many logistical issues for us to even consider it at the moment. Is there ANYTHING else I can try??

Edit: I’ve also washed everything he interacts with multiple times