Stressed for final in a class where it’s memorization of concepts…

I used to be good at memorizing things and now I get anxious and just forget things. I have a final coming up and I have 5 days to study for it. (Wish I had more time 😭) this classes final is mainly memorization/concepts memorized and basically the format is open responses ,it’s not like I can plug in formals (I’m okay with that)… how do I memorize from the PowerPoint lectures (7 in total) so I can get a decent grade (85+). I made flash cards in the past for this class and studied them and got bad grades. He gave a study guide and someone in my class said they just memorize everything listed on the study guide from the PowerPoint lectures…. But how does one do that? (Sorry if this is a dumb question,I’m just so confused and anxious and also angry at myself for my grades in this class)