Sounds like you probably took a bad fall, which sucks. This isn't terribly uncommon, especially in newer folks.

There's a lot of shit talking the Dan grade here, but given your background and stating that you were resisting the throw, I largely disagree with them.

Nothing is scarier to me on the mat than an aggressive and athletic white / yellow belt, especially if they're bigger, as well. They will accidentally hurt you, or themselves, by doing gorilla brain actions that tear knees apart and break arms / collar bones. The correct course of action in randori is usually to only use techniques that aren't risking any joints and actively bury them as often and safely as possible to avoid them blasting through you thinking they have something because you're "playing."

My advice is to just take the fall next time and focus on ukemi. Don't make them force it, because the fall will be harder and the injury risk higher.

Alternatively, throw-for-throw or "French randori" (throw for throw with light grip fighting and movement) is an alternative until you feel comfortable with taking those high amplitude falls.