Sa mga pharmacy graduates jan, any study tips?

Problem/Goal: study methods (maybe because of bad habits?)

Context: bs pharmacy student here, shiftee from civil engineering program. Ever since nung nasa ce program pako hirap na talaga ako mag focus kapag nag sstudy. I noticed din na it all started during pandemic era, mas maliit pa attention span ko kesa sa ibon and it is starting to frustrate me because I badly want to ‘not’ be mediocre lang on my academic performance. I used to enjoy studying but now di pa umaabot 30mins inaantok na ako or humihikab ako every 10 seconds, tapos when I decide to take a break or mag nap muna para tumigil yung pag hikab ko, nawala yung antok ko??? Genuinely curious if may bad habits lang ba talaga ako or may underlying health issues ako? Any advice on how I can do better?

Previous attempts: Tried so many study methods na like the pomodoro method as an example. So far yung method lang na nagwowork sakin is if babasahin ko out loud yung notes/book 30 minutes or an hour before the exam. Ayaw ko namang masanay sa cramming kasi hindi naman lahat ng courses naccram and not all courses nadadala sa pa-notes or not helpful din minsan yung books.