Have you hired a divorce lawyer yet? If not, consider doing so.

Were you served with any papers from the court which reference possession of the home, or preclude you from going into the home?

If you aren't on the mortgage, not paying the mortgage probably won't affect your credit record. But if you continue to pay it may lend credence to any claim you have that despite the quitclaim the home is marital property - that's something to discuss with your lawyer, along with the valuation and division of the marital estate.