Puppy stepped on.

my 7 wk old pure staffie has just been accidently stood on by one foot of my 14-15 stone husband not all of his weight but he stood on the pups side and rib cage he was led on a mattress i have felt his ribs and he does not yelp he did a bit afterwards he has now gone quiet and gone to sleep i checked his pupil resonse to light and they are sort of reacting his breathing is normal but his heart is beating really fast should we let him sleep is he suffering from shock or does he need to see a vet as i am a single parent on benefits but obviously i want him to be okay thing's i have tried so far is checking his pupil response and they are sort of reactive,a breathing check which seems normal,his heart rate is quite fast,i felt for broken ribs but don't think i can feel any breaks but don't really know what to feel for but thought i would see if he yelped in pain when i did it he didn't,but he has gone all limp and fell to sleep i would just like to know if he is in shock or needs to see a vet as i am a single parent on benefits and cant afford to pay a vet but want the pup to be okay so please could you help if possible thankyou