Should I e-mail my professor after completely blanking on my final exam? I had a final exam today in my dynamics class. I took the exam with Adaptive Services because of my medically diagnosed ADHD, Anxiety, and OCD (among other things). I have been studying since Thanksgiving break and felt pretty confident going into it. I was even in the library just this morning teaching my classmates how to do things before the test. 

Well, as soon as I was handed my test and opened it, I completely blanked looking at the first question. I was luckily that I had the extra time, because I started remembering things slowly, but before I knew it the 3.5 hours have already passed and I was out of time. I ended up getting 3/5 questions done (don't know if they were right), and made progress with the others so I am hoping the partial credit will be enough. 

This is already my second time taking the class; I had to withdraw last Spring. I really don't want to be forced to take this class again: it is very time consuming and rigorous, it is a prerequisite for all my other classes (so if I failed I cannot move on), and, the main reason, I know the material. 

Unfortunately, I really don't think it will be enough. I am devastated. I have been having a lot of trouble with my university lately, and I have strongly considered dropping out after last Spring. Failing this class will probably be my tipping point. I don't want to drop out, but I can barely afford it to begin with, failing the class could cause me to lose financial aid, and I can be far more productive doing something else than retaking a class I already have a strong understanding of. 

I am wondering whether emailing my professor might be a good idea. I don't want to come off as defensive or making excuses. I'll be the first to admit I'm not the best test taker, I am lazy when it comes to school work, I don't get the best grades, etc. so I fear that it will look like an excuse to my professor. I just want to say something along the lines of: 


  Dear Professor, Thank you for a good semester, I enjoyed your class but I am nervous of how the grade on my final will come back. I have been studying very hard and felt like I had a good grasp of the material going into it, but as soon as I sat down and looked at the first question I blanked. Over the course of the exam, I was able to work some stuff out but I don't know if it is enough and I'm afraid it won't be. I am not expecting any type of compensation or anything, but I wanted to bring this to your attention incase there was anything that could be done. Thank you, happy holidays. 


Do you advise sending this mail?
Sending an email to your professor is fine. It also sounds as if you are doing your best, understand the course well enough to at least pass, and are not making excuses or asking for undue favors. Your professor will know this as well and will be much more willing to help you out because of that.

As @DreamConspiracy points out, I'd state more clearly what you hope to achieve by sending this email to your professor. This might be something like: "Is there any way for me to retake the exam in case I get a failing grade?"

If you are worried about losing financial aid, maybe you want to also contact the financial aid office. How are your ADHD, Anxiety and OCD implemented in your aid package?