Pasta

I just ate rigatoni pasta with a red sauce and vegan italian sausage and I immediately felt sluggish, heavy and now I have a headache.  I don't eat a lot of pasta and I usually eat whole wheat spaghetti or tri color rotini.  Everything tasted good, but I just don't feel good now.  I felt great before I ate it.  I will try the vegan sausage by itself and see if that is it, but I think it is the white pasta.