Thank you for your query at DoctorSpring.com.
Your condition requires a thorough evaluation and you have already neglected it for a long time.
You need an urgent consultation with a surgeon.
After a physical examination, you may need a CAT Scan to look for the internal injuries and status of your hernia as well.
Symptoms which require immediate medical attention and a need to go to the ER are: vomiting, distension of abdomen, not passing flatus and stools, blood in vomiting or stools, fever and jaundice.
Please consult a surgeon, either a general surgeon or a surgical gastroenterologist as quickly as possible. You can even consider walking into an urgent care clinic.
Please make alternate arrangements for taking care of your dog as your medical needs too cannot be ignored.
I hope this was helpful. Feel free to ask queries.