This question already has an answer here:
I got a call from a recruiter and he gave me an offer, I was nervous and excited when I agreed to it. He said he will submit it for approval and will take a week. I hung up and forgot to ask about other benefits, so I called him back. He explained a few more things and also told me he told the hiring manager I agreed and is super excited I am on-board.
Once I got home, it all sunk in and I realized I should have negotiated. Is it too late? If not, what can I even say?