because 10 week old ds will only nap for more than 30 minutes during the day if he's either being held or in his seat. I can't sit holding him for hours on end. I have a ring sling but he's too hevy to hold for long periods of time and it starts to hurt my back.
If he's in his seat he'll sleep for up to 3 hours at a time and is happy. If i try to settle him lying down he wont settle into a deep sleep and will become over tired.
At night he's on his back and settles (because he's in our bed) and he spends lots of time on his back during the day playing on his mat.
But i'm worried if he continues to only settle in his carseat during the day that it may lead to back problems. Is this possible?