Eh, high platelets in babies memang jarang dengar lah, most of us never encounter this! I'd really suggest you check with your paediatrician soon sebab this needs proper investigation, bukan something to wait around for. A few of my mum friends have had babies with unusual blood results, and each time it turned out ada specific reason (bisa infection, inflammation, or just lab variasi) that only the doctor bisa identify properly. Hang in there, and do get it checked out quickly okay!