Appeal or start over?

Hello. I've been applying since February of 2023. I had my hearing in October of '24, and was denied in December of '24.

My lawyer won't get back to me, so I assume she's dropped my case, but I need advice desperately.

The ALJ I had was genuinely harsh, even my lawyer wasn't happy. In the denial letter he said my doctors were "unreliable" and I was a "liar" and that my disability claims were "extreme allegations"? I don't understand how he can make those claims when I have medical proof of my disabilities.

Do I start over... or appeal with this ALJ?