Hi there,
I think something you should consider is that there are many different masters programs, for every type of student!! Meaning that you can find a masters program that will accept lower grades. Of course that would mean that it might not be the best program in your area, but might still be worth it!
Now, on the other hand, you already have a job. And it seems like you are doing well. So it might not be worth it to drop everything and go to graduate school, unless you go to a graduate program that will give you more advantage in your field of work. For example you don’t want to go to a so so graduate program just to end up in a similar job as the one you are right now! ( Because in this case you pretty much spend 1-2 years in school, plus paid a significant amount and did not move up professionally wise!)
That’s my personal option, I hope it helps!!
Just keep in mind, you can still apply to graduate school and see where you get in. You might be surprised!