Diabetes in pregnancy

Ashley
Hi ladies 
I'm 19 weeks with my 3rd child. Feeling overwhelmed my oldest is 14 my son is 9 and  baby #3 due in July(people say I'm crazy with the age difference) I eat right most of the time  I can't keep my sugars under control my high risk dr changed my Meds 2 times already really trying to avoid early labor or big baby and and problems with my newborn and everything that comes with diabetes during pregnancy and would rather not be on insulin  dr said he doesn't want me going full term probably between 36 & 38 weeks. So nervous. Does anyone have any suggestions or is going though same thing??