Lol, IMO, if you're not stressing right now, you haven't been taking the exam seriously enough!
I graduated last May and took the exam in July. My class organized a TherapyEd course review so we had access to their quizzes and at least one practice exam (I think). I also took the 3 O'Sullivan exams and I think passed one, barely. If I recall correctly, my scores on the others two were just short of passing. In addition, I had the Scorebuilders App on my iPad that I used with a group of classmates. We met on Sunday evenings and did various timed quizzes. We reviewed each quiz together afterwards and had further discussion, if needed. I don't remember the scores because we broke up the sections each Sunday. Personally, I believe it was more of an opportunity to get together, drink wine, and decompress a little from all the studying.
I did not take any of the PEAT exams. I found the Scorebuilders material to be "easier" in comparison to my actual exam, and the "O'Sullivan" exams to be more difficult. I believe I had read others' echo the same, so take that into account.
While I wouldn't discount the scores you have received thus far, take a moment to assess your level of understanding/comprehension of the various sections you have had difficulty in or did poorly in. If you truly feel you are not ready to take the exam in April, go with your gut. If it's more of stress/anxiety than actual readiness, rest assured, I remember the feeling and I'm sure a large majority of the April NPTE test takers are feeling the same.
Good luck!