HELP!! ADVICE!!

So about a month ago we went into the dr because my son was eating weird things and they checked his iron levels and they were low so they told us to go in in one month to check them again, well we went in today and his levels were lower this time 🥺😭 7.6 to be exact.

Dr mentioned to us lots of things and one thing that as a mom terrified me hearing was cancer , (leukemia). He gave him another two week supplement to see how his levels are and if they keep going lower then he wants to do blood work and further testing on him 😭😭😭 as a mom it’s super hard to hear that…. Anyone gone thru this or any advice on what I can feed him to help him get his levels up?

Dr wasn’t super concerned now because he said in a month he gained 2 pounds and is still super active and isn’t showing any signs of being sick or being in pain or anything. But still I’m freaking out and thinking the worst now 😭😭😭

If anyone can share their stories or if they’ve gone thru something similar and the outcome or what to expect please