What you studied in HS won't matter to many employers unless it was auto mechanics or tile setting. Seriously, you can't get a scientific job by telling employers, "I worked hard on physics in high school." That's not enough. They have master's degrees in physics as your competition.
The business world is different. They are used to taking people with various kinds of degrees for entry level positions but it would help to have some job experience in a business. In other words, while your MA in Linguistics shows you're smart, in the business world they want to know if you can manage time, money, or people. Does your MA show any talent for that? Not really. That means you'll be starting out at an entry-level postion in business and you'll have to prove yourself.
That's okay - that's how it's done and proving yourself can take anywhere from 6 months to 2 years, but it can happen. Then they will promote you and give you more responsibilities and a raise. But, again, that really depends on the company culture of where you work.
Company culture is something they never teach in college. Isn't that awesome? (I'm saying that sarcastically.)
Would an MBA help? Maybe. But you can't just keep going to college believing it's going to prepare you for everything you'll face in the work world. IT DOESN'T. Our colleges should do that - we've paid a lot of money for them - but one of the huge flaws of our higher education system is that academia is oh so lacking in real world preparation.
I wish we had a system more like Germany's. There, apprenticeships (paid training at a real company) are popular and seem to be helping their economy boom.
So my advice to you would be to get a job. Get out there, work for some company you think you'll like, and see what its like. If you hate it you might be able to be a college professor with your MA but those jobs are very hard to find these days and most start as part-time non-tenured.
Just get a job in the business world. That will teach you everything our higher education systems are so behind on.