Your dermatologist has given you good treatment in the form of Doxy, zit care and acnovate. Still continuing Phexin?
Next Steps
See if you can add a cream called Faceclin or Nilac, for application for full face thrice daily
If not using any prescribed face wash...use a soap Dermadew Acne(if oily skin) or Episoft cleanser ( if very dry skin)
Health Tips
Better to consult your dermatologist again..Acne is a chronic condition and requires a few follow ups and regular skin care even after acne subsides completely. after all, your skin too is a living structure and needs maintainance