Pumping

For those who live with big families..has this happen to you.. I don’t really pump much nor do I cook or open the freezer much..but happened yesterday I opened my freezer n saw my frozen breastmilk shaped differently..I asked around the house did anyone remove my breast milk from the freezer n my mum said she once found the freezer door was not closed properly.. So I have no idea how long the freezer door was opened to make my milk become liquid enough to change shape.. Would the milk still be able to be fed to my 4 month old baby? I should wait to ask my doctor but I’m kinda feeling lost now..