Amazon SDE2 Interview Ongoing

Hi Folks,

I am currently interviewing for Amazon SDE2 position.
I have completed OA and 3 onsite interviews. And 1 bar raiser round is in upcoming week.
first onsite round: (Design): It was a design round and some LP questions with senior sde, and overall it went okay. I took a feedback from him at the end of the interview, he told it was a good discussion and I forgot to ask for non-functional requirements. But i discussed the NFRs anyway, just forgot to write them down.

second onsite round: It was a problem solving and round with 1 question on graph and 1 on n-array tree. I was able to solve graph question but I made a mistake in that, interviewer pointed it out and I was able to fix that quickly, the second question we only discussed the approach.

third onsite round(Hiring Manager): This round started off with 2 LP questions and it was much more detailed and took around 45 mins. after he asked one medium ds question and I was able to complete it and he looked satisfied.

I have forth round upcoming,
I am feeling down since I think I didn't crush in 1st and 2nd interview and I most probably will be rejected, Can someone share thier similar experience. And how should I prepare for Disagree and commit LP?

Thanks.