Baby measuring big

A.

I failed my 1 hr test and passed my 3 hr test. Even though I passed the 3 hr test my baby gained over a pound in 13 days and now my doctor is concerned, I’m 32 weeks pregnant and baby is measuring at 4.14lb at about 2-3 weeks ahead. She says we will have to keep an eye on him. Should I test my sugars after each meal to be safe? I don’t know what to do 😲