just throwing out some ideas here - you might be a kinesthetic learner in which case interacting with the material will help you. For next time, order some highlighter tape online (they don't have it in stores) and physically highlight what your reading. If you have your text on Kindle or can read text on your phone, highlight that way. But that might not be accessible to you right now in which case take a pencil or pen and write notes as you read. The concept is that you want to engage more of your senses. You might try reading your text into a microphone and listen to the recording before you go to bed.
If you can do 10 min., you can "up it" to 15 by giving yourself a little reward when you do - 5 min. of daydreaming about your beloved or re-living a happy experience, listening to 5 min. of your favorite musics, etc. Then try to up it to 20 min. You need to reward yourself.
Have someone study with you. My friend in college and I found a room that was used as a storage room for furniture. No one knew about the room. Every night I took my philosophy book and she took her chemistry book and we sat on the discarded couches in silence in the room and just studied. That was easier for me because studying is a very lonely prospect
Find relevance to what you are studying. Just trust that everything in your curriculum, whether you think so or not, will be relevant to you in life some time or another. To this day, studying Plato's Republic and the concept of means between extremes, etc. is useful to me more than 45 years later. And I do mean 45 years later!
Make studying a game. Make yourself a trivia game out of your content, even if it's something like Math or Computer Programming. You can be creative and quiz yourself.
Just know that in life, you only regret the things you didn't do that you knew you were capable of doing. You will feel tremendous pride (if only the pride of self-discipline alone) knowing that you conquered something that was difficult for you. Look at it like a marathon and KNOW you can do it and that you will be proud of yourself when cross the finish line.
So after you've read all of these comments, STOP READING these and get back to work. Then tell us later how your exams went. We'll be watching for the results!
Best wishes, Billie