Dreft Question (FTM)

Megan
Hi experienced Mommas! I'm 38 weeks so I'm starting to wash everything and do all the last minute stuff to be ready for my munchkin. So I have a few questions about detergent, I have bought dreft. 
Do I use it on everything? (My clothes, husbands clothes, sheets, etc.) or
Do I only use it on stuff baby will be using/wearing?
Also how long until I switch back to regular detergent?
Do I need to wash all her brand new stuff?
Thanks in advance ladies!