Less sleep

My son is 10 weeks old . He don’t sleep for the whole day. He used to wake up around 6 am and sleeps only at 10 pm. Again wakes up at 3 am then after feeding he sleeps at around 4 am. I used to breastfeed him every 3 or 4 hrs then used to give him 4 Oz formula every feed since he used to cry after I breastfeed. I am really worried about his sleep duration. Is it normal?