Hey mommas!

My LO has reflux problems so I’m on the elimination diet. He got diagnosed a month back and he’s on Zantac. Now the question is that I have a lot of milk that I kept in the freezer(attached to the refrigerator) since week 1. He is 3 and half months now and since I didnot do the elimination I cannot use that milk right now. Is it okay that I use that milk once I start giving him solids I.e, to mix it up with cereal? It isn’t a lot that I can donate and I’m planning to stop pumping once he turns 6 months but will the milk be good till that time? He has some weight gain issues too so we are giving him high calorie formula as well. Right now I’m in a dilemma as to what to do with all that milk that I pumped for him! Please help