Anyone else?

So I just had my son who is now 3 weeks old. And as lots of newborns he has his days and nights mixed up , and like normal ppl they nap during the day like baby’s and change their sleep schedule. Me it’s so difficult to. I try sooooo hard to force myself to sleep but I just can’t. I can be sooo tired and still can’t sleep . I have no idea why , I wanna try & fix it but I don’t know how exactly. I don’t wanna try sleeping pills & be still tired while I have to nurse to my child and breast feeding can become very exhausting & sometimes he like to just stay awake and be held. It’s very stressful I don’t know should I talk to my doctor about my sleeping ? Any suggestions?