You will with that mindset! You have to keep positive and proactive - revision isn’t fun but you have to do it. Start making mindmaps, quizlet’s with vocab, find out your learning style, YouTube videos. Do a little every night and you’ll find yourself improving. Be active in lessons, ask questions, if you don’t understand go at lunch or break to ask, see if there are lunch clubs for a subject, study with friends who are doing well and let them teach you (this is the most effective way of revision for them too). Start chipping away at the workload then you won’t be so overwhelmed! Most importantly you can do it!!