Serg,

The clot eventually breaks down in to small pieces before it dissolves completely. Don't be concerned about losing a small piece. Just be careful not to irrigate aggressively.

You should eat a nutritious whole foods diet like plenty of vegetables, fruit, and lean meat protein. Limit or avoid refined food (pre packaged, frozen, canned) sugar or sugar substitutes. This type of diet supports health and is ideal for healing. For a few weeks try to avoid seeds as they can get lodged in the socket, chewy foods as it requires too much use of your jaw during the healing, and hot/spicy foods as they can irritate the wound.

Hope this information is helpful to you.