According to me, you start treatment as soon as you can. Most adults with crossed eyes were born that way. Talk to a pediatric ophthalmologist, an eye doctor who specializes in working with adults. He may start treatment with eyeglasses & Glasses may solve the problem.
You cannot really deal with this problem without a medical eye exam with an ophthalmologist. Please see one in the coming weeks. If you are on anxiety medicine especially if just on or your dosage increased that can cause this problem. Start by seeing an ophthalmologist.