30 minute naps :(

So my LO is 10 weeks. For the past week or two he only will nap for 30-40 minutes top unless he is sleeps on someone. At night he sleeps in 2-3 hour increments. I try to look for his sleepy cues but I'm having a hard time with that. He has white noise and cool temp room. The internet says he is overtired. How do I get him normal if he won't sleep. Any tips?