You didnt say Arihant for what. My suggestion is, even if you are not able to complete full portions.. dont worry. Completing 5 chapters in depth is far better than completing 15 chapters superficially. So dont loose you patience and in the time you have left try to cover chapters in depth.
Best of luck
PathFinder
Technocrat
IIT Delhi, 2004 Batch
Currently in Student Counseling & s/w Industry