you really should consult with a knowledgeable real estate lawyer in south carolina. its not infrequent that purchasers change jobs during the mortgage process and typically when that happens the purchaser must certify that the income from the new job equals or exceeds the income from the previous job. the problem that may arise is that the loan may be contingent on continuation in the job. thus the reason to consult with an attorney. he or she will be able to assist you with the mortgage process and inform you of the best course of action to take.
without a detailed review by a lawyer can all the issues raised in your question be appropriately addressed.