Jalapeno Popper Fettuccine Alfredo

fettuccine, uncooked

unsalted butter

small onion, chopped

garlic cloves, peeled and minced

jalapenos, chopped (seeds removed if desired)

cream cheese, softened and cut into pieces

milk or heavy cream

shredded cheddar cheese

grated parmesan cheese

slices bacon, cooked and chopped into pieces