Issue seems to be that you thought the questions were easy when reviewing, but didn’t get them right on the actual test. let me know if that’s incorrect.
You need to self diagnose what went wrong on the test. Did you make careless errors? Did you rush due to time constraints? Did you make mistakes due to “nervousness” from the test? Try to think back to when you took the test. For any particular “easy” question, why did you get it right when reviewing but not during the test? Go through this with each wrong question and try to build up some evidence/pattern to identify.
Finally, try your best to be unbiased in reviewing. The fact is that for each question you solved in 2-3 minutes with review, you already had 1-2 minutes to look at them (from taking the test originally). Additionally, 2-3 minutes is a step too slow for the test itself. You should also think about speed in this case.
You won’t make any major changes within 2 days, but try to come away from this with a couple key insights to think about/improve in a very targeted way. Good luck!