You cannot concentrate because of the Rahu Mahadasha and Mercury Antardasha that is going on. Mercury is the planet of intelligence. Rahu is the planet of distraction. Doing the Rahu mantra will help.
1. Recite Mantra “Om Brim Rahave Namaha” 108 times daily
Blessings,
Navneet Khanna
Vedic Astrologer