Do you want to stay in keeping with the style of your house or are you willing to depart? A thoughtful juxtaposition can add a lot of interest.

Hi. If you plan on keeping your bedding as it is, then I suggest you pick up a very light lavender from it for the ceiling -- something like the colour below.

Basics first, please get rid of any plastic furniture like that chair. secondly all table tops need to be cleared of little mirrors, table clocks etc. just place three most loved items of your choice ! Arrangement can also be improved the table could come on the side and bed could be centred a bit better (along the window behind it). Walls can be painted a neutral shade like light beige with a rug of your choice on the floor (contrasting- like red so that the pink curtains could go with it)If you could change the curtains then the best option would be to pick a solid colour of your choice and a matching rug (blue, red etc whichever is your fav colour but please avoid printed cutrains)

I agree the plumbing looks sketchy i wouldn't invest a lot of money of decorative treatments if the pipes burst down the road. I would also look into your water quality it looks like you have a lot of rust stains that indicates high iron in your water which can really be hard on your plumbing and appliances. CLR is a product to improve the appearance but i would also look into Water softer as well. Stay away from natural products if your water is high iron they will stain fastest. Congratulations on the baby.