Pet Pig hit by car

Question
I have a pet pot bellied pig that was hit by a car 3 days ago.  He has many of the same issues as the last pig from August.  My pig is two years old and over 250lbs.  He doesn't just go the doctor and I am struggling what to do. He was better the 1st and 2nd day. He was up walking around and he has always been eating.  The last day he has stopped walking around and doesn't stand much at all.  He has been pooping but I have not seen him pee.  He moved out of the garage and has been in a bush by the house for the last two days.  We just moved him back into the garage and he did even put up a fight.  The exotic vet gave me somethings to do to check for internal bleeding and I can either take him to her, but in the end he'd have to go to Purdue for treatment if it was serious.  He is always shaking just little shakes like he is cold and his breathing is long controlled breaths in and out like lamaze.  What do you suggest and how did the August 08 hit by a car pig turn out.  This was also a low impact event but he was stuck under the truck and the truck had to be backed off him.  He was stuck but was not hit by the tires.

Answer
I am not a vet, but this poor pig certainly needs one!
Please take him to Purdue or a vet.
Otherwise, we are just guessing at what is wrong.
The fact that he did not put up a fight worries me.
The pig needs a vet to see him. Sounds like lung damage.
Good luck,
Pris