Type 1 diabetic. He is facing?

My son is diabetic since 2.5 years. He is now 5.5 years old. He takes lantus solostar and actrapid. We used to give him 4 units actrapid before lunch and 2 units before dinner. Lantus 5 units at 10 pm. But he caught with cough and cold on 14th August. Since then his readings are 300 to 400 range even after giving him 17-20 units total insulin which was earlier 11 units. Also what I have noticed today morning his bedtime bg was 81. I gave him one goodday biscuits and 2 walnuts. I didn't give him lantus solostar because I wanted to change it to morning from night dosage.at 5.25 am early morning his bg was 128 but at 7.30am it was 211. Is it somogyi effect or dawn phenomenon he is facing?? Also what should I do to bring his blood glusocse levels to normal. Please help.