my baby is 3 weeks old. I have started using nappy pads since the last 2 days. As a result he does sleep for around 3 hours and more at a stretch. However, he seems very restless while sleeping - he whimpers and moves around a lot.

Is this okay mommy replied. when my baby was doing the same thing, i started using disposable diapers. It helped him sleep well.
don't get your baby habituate to swing or rocking. you are inviting troubles because afterwards baby will not like to leave cradle,swing or rocking.i had a very bad exp with my first baby so i am strongly suggesting you to avoid swing or cradle.
i also want to add that it is normal for babies to whimper or remain restless.
give him bath before sleep, wrap and then feed him. my baby used to sleep as soon as i would wrap and feed him. neetu replied. try plastic nappy liners or disposable diapers. your baby is waking up because of wetness.
mom replied. Couple of possibilitis:

My baby had the same problem, though i was using simple cloth nappies.

I discovered that my baby needs more than 1 burps after each feed. I wd put her down after 1 burp and she wd whimper and b restless. When i started buring her 2-3 times keeping some time gap, she started sleeping peacefully.

However other prob i faced then was that the baby wd wake up. So i started using swing which solved the prob.

See if ur baby has same prob. Or else, it might b bec of gas. Check ur food, check if baby is having gas.

All the best.
Mom.