<p>Chill with all the test taking! You’re going to make yourself nuts. Pick either the SAT or the ACT, prep over the summer and take in the fall. They are very different tests and prepping for one isn’t going to help you much with prepping for the other. Focus your time on only one. Unless your May SAT score is a significant improvement, your current ACT score is better. And it’s a lot better if you took the ACT the first time un-prepped (which your post makes it sound like you went in cold). </p>
<p>And FYI, there is no September SAT. There is a September ACT, though, which is a great bet if you’re planning on prepping over the summer. The first fall SAT is in October. But whichever test you take, there is an opportunity to take it once more before application deadlines (November SAT, October ACT).</p>