I had a pork italian sausage and i think it was undercooked i did not know until i had about half of it will i get sick and can this kill me?

It is unlikely to make you sick and highly unlikely to kill you. If you get nausea, vomiting, diarrhea or fever, see a doctor. For healthy diet: http://www.choosemyplate.gov/., exercise 30 minutes/day, drink enough water daily so your urine is mostly colorless, have safe sex, no tobacco alcohol weed or street drugs. Get HPV and Covid vaccines. Wish you good health!

Unless the meat was contaminated it is not likely that you will get sick. You might get mild indigestion symptoms, but not life threatening ones.