I'm due in just over 3 weeks, and we have a crib, but no linens! The crib we have is the Ikea Diktad with a foam mattress. I'm a little lost as to what to get, so I am hoping someone could help me with a few questions:

Do I need anything other than sheets and mattress covers? (Eventually we'll need a blanket, but summertime in California doesn't really require one yet.) Will the mattress cover completely protect the mattress, or do I need something underneath it?

How many sheets and mattress covers are recommended? I've read I should get 3-4 fitted sheets, but I haven't seen estimates of how many mattress covers I should have on hand.

Any recommendations on good mattress covers? They seem to range in price from $5 to $20

TIA!

Jen