Over harvesting or Shock Loss

[ayush]

Had my HT on Jan 22 on this year by FUE method with 3000+ grafts taken from the back of head and sides.The back has filled up nicely but the sides appear patchy. It's 3 weeks post OP should I be concerned.I am very much conscious about it and thinking to use hair fibre to cover it up for time being.
Current Medication: Finasteride, Biotin, Minoxidil 5%