Has anyone else felt completely defeated before a big exam?

I have an important exam coming up and honestly I do not think I have ever felt this stressed. I have been trying to balance university work with a part time job and I keep falling behind on my revision plan. Every day I tell myself I will study more but something always gets in the way. Last night I looked at all the topics I still needed to cover and felt my confidence disappear. I was so overwhelmed that I caught myself wishing someone could take my exam for me just so I could stop worrying about it for a while. Has anyone else ever felt this much pressure before a test?