Hi Chelsea @chelshubbs, the HbA1c is an awesome tool, but no more than a tool we use to manage our diabetes. As @Joe said, it is an average of our body glucose level, 24 hours every day during about a 90 day period. I say “awesome” because I was involved in its development in the early 1970’s - but a “good” A1c does not tell the complete story.
Just use me as an example; for about a dozen years my HbA1c ranged between 6.1 and 5.9 but EMS had to revive me a couple of times when I went down as low as 9 mg/dl - BAD!!! Now my endos recommend that I get it up to at least 6.5.
A pump, if you use it correctly can be of great assistance in managing diabetes but you will still need to pay attention and work with it; some of the new systems of CGM and pump are worth looking into. There are a couple of Topic Lines on here with lots of advice and comment.
I’ve only recently resumed using a CGM and it will not communicate with my pump, but it has alerted me in time so that I suspend pump operation and have avoid going too low.