I've had sores that have recedded but the hard lump doesn't go away until the winter and I can keep riding on it. If there isn't active inflammation and it doesn't hurt to the touch use a good cream to stop abrasion, consider new shorts and/or any fit issues with the saddle. Some sores are caused by chafing/movement and some are from excessive pressure. Sounds like you might be on the road to recovery and just start back slow and keep the area clean. Some days I end up taking 4 showers total between commutes to/from work and an evening ride.