Nauseated feeling in brain still present 4-5 days later a hangover

(I’m a really bad lightweight)

So I got drunk 4-5 days ago and I’ve already overcame the actual hangover in which I felt bad physically, but for some reason I still feel this nauseated feeling in my brain (only in my head, not my stomach) and it’s not going away. It’s like the same way my brain/head felt right before I was about to throw up, but it’s like constant now. Its not strong enough of a feeling to make me feel sick, it’s just uncomfortable at this point. Is this just general post hangover nausea that’ll go away with time hopefully, or is it something different?