little daynap

Hi mummies, my 9 week old baby sleeps well at night but i have difficulties putting him to sleep during the daytime. Have to carry till he sleeps and even so, he wakes up after a short while, sometimes less than 30 min and sometimes less than 1h. I see him yawning after the short nap but even if carry, his eyes are very big and he does not sleep. Total sleep he has in a day is probably 12 to 13h. Do i need to be concern if he has little sleep?