Usually gum should cover the entire extraction site in a months time. If there are unusual bone height difference between walls of the socket then total coverage might not happen (Pic not clear). In that case (if no symptoms pain) we need to file the excess bone a bit and cover it properly with the adjacent gum tissue and suture it.
Next Steps
Get it evaluated by the dentist soon and get the above mentioned procedure done.
Health Tips
Chances of infection are high, maintain the area clean.