I am 38 weeks pregnant and nesting heavily, we just got a lovely crib (bit late I know) and thinking of getting the jungle family range from mothercare for the bedding, but which bits?The crib is a family heirloom and comes with a wipeable mattress, do I need another one on top of that or can I just cover it with a fitted sheet? Clueless first timer so please do assume I know NOTHING :)