Maryland has abolished the traditional laws which would render a bigamous marriage void ab initio (from the beginning), so it appears that your dual marriage won't of itself void your current marriage. (Your spouse could seek an annulment.)
Quote Quoting Ledvinka v Ledvinka, 154 Md. App. 420; 840 A.2d 173 (2003)
As we stated earlier, divorce is a creature of statute and only the grounds enumerated in the statute will support a divorce decree. Because the ground of void ab initio is no longer available under the statute, the only remaining option for dissolution of a bigamous marriage is annulment. We therefore hold that the trial court erred in granting an absolute divorce on the ground that the marriage was void ab initio.
I suggest getting help from a family lawyer to complete a divorce or annulment of your first marriage, and inquiring with your lawyer as to whether you and your spouse should take steps to actively reaffirm your second marriage.