I took the chapter 4 test today although I am almost
positive I will take it again. I feel like I did very
poorly on the test and there were 2 problems for which there
were no numbers. If I want to count this one as a practice
test, can I just go on and take it again one day this week?
That is certainly permissible. I picked up tests around 1 today and don't have yours yet. If you turned it in earlier than that let me know right away; otherwise I'll get it tomorrow.
You might have done better than you think. Some of those questions aren't valid and are not counted in the grading.