There may be reasons like she feels hot too...
Put comfortable clothes for your baby...

You just give one glass of milk before going to bed...
And don't make your baby to sleep more in the morning times...

Hi sleeping pattern differs in every baby and will vary till age of six months after that It will become constant gradually thus don't worry about it

Hi around 6 hrs you have to change diapers

Hi sleeping pattern differs in every baby and will vary till age of six months after that It will become constant, but feed your baby every 2-3 hrly and on demand by waking up

Due to colic... give colic drops

Hi what all you give in the diet? And how many times you feed ur baby?

Check if your baby is getting stomach full milk.

Hi sleeping pattern differs in every baby and will vary till age of six months after that It will become constant gradually thus don't worry

Increase babies physical activities. Taking her for walks, introduce play gym etc. Start feeding her in regular intervals. Start with night massage.

No it shouldn't cause harm to your child.