@4lgd How many weeks are you now? It's pretty normal to have to do corrections and test loads as you get further on.
Do make use of your DSN if it's getting to you. A clear head can often see the answer.
Don't worry too much about diabetes management with a newborn. Things go back to normal insulin needs-wise and often you need less insulin than pre-pregnancy. There are tips here when you get to that stage, but don't worry for now.
Keep going. It sounds like you're really working hard at keeping good control. That's brilliant