Can you identify exactly what it is you're struggling with? Coping with the workload? Essay writing? Understanding the concepts? Has the subject moved on since you graduated, so your previous knowledge is out of date and you're struggling to catch up?
If you can identify specific areas of difficulty, can you ask your tutor for help?
If it's just one year, you must be halfway through now; you've made it this far and you're nearer the end than the beginning.