Hi Sir, My Son Has Got Dengue Fever Which His

Hi Sir, My son has got dengue fever which his platelet count has come down from 1.55 to 1.22, then to 99, then to 72, and then it has went up to 99,000, after that doctor told no need of drawing blood samples, for 3 days he was having no fever, and suddenly from last night onwards he got fever, I took him to doctor he has given antibiotics and injection, my doubt is there any chances of again platelet count decreasing. Please suggest me in this one.