We are similar and I studied math as well. I solved this problem by just buying a friend coffee regularly in exchange for notes. She used to take fantastic no

We are similar and I studied math as well. I solved this problem by just buying a friend coffee regularly in exchange for notes. She used to take fantastic notes and they were probably the reason I even excelled in a lot of classes. However, there was no substitute for being deeply engrossed in whatever the lecturer was saying. My only regret is not having figured this out sooner.