Revision will be my demise

I have 3 subjects(control system and network theory and digital , left EMFT and communication) remaining more to revise and practice questions and pyq and its almost February I have not attempted any mocks yet.

Getting severe anxiety due to this but when I try to solve the other subjects pyq I can do it with ease with only 1 revision so I feel like i can attempt a pyq without being scared.

What to do? Do half hearted revision or do revision with full focus but give up the time?