Keep easing sails to maintain some speed through the water, even if this hinders pointing. In moderate gusts you can get away with just easing the mainsail, but in the bigger gusts ease the jib sheet. Otherwise the jib slot will choke as you are playing so much mainsheet.
Once sailing downwind, the forces will be handled by steering – the lower you sail, the less the heeling force on the boat. Trim well back to counteract the forward forces on the rig.
The wind in the sail and the force created by the daggerboard acts under the boat, creating a heeling force. If this force is too great, the boat may capsize. Keelboats use the weight of a fixed keel to keep them upright, while dinghies and multihulls rely on the weight and position of the crew.