I brought a second hand Moses basket, but I decided to replace the old mattress with a new one, problem is I took it out the packaging without realising it was too big for the basket! So now I can't return it... Does anyone have any suggestions?! Would be much appreciated :) I currently have the new one on top of the old one cause the new one isn't as thick as the old one but I don't know whether that will be a problem for baby when he gets here?! Help!!!! :')