Unfortunately, the area that was harvested before is not available for any more harvest, as any more hair removed from that area will make it much worse. Having said that, your sides and still mostly intact, but I would recommend that you be very careful and very conservative in future...
Looking at the photo you have provided, around 4000 grafts can be extracted from your donor area. But, the area that needs to be implanted plays a big role in the results and density of the hair you will have after the hair transplant.
If you provide photos of the area that you need to implant,...
There may have occured a kind of tissue damage at while or post-operation phase sir. It would be quite helpful to make it checked by a specialist doctor again. It is pretty hard to respond your inquiry or find the actual problem unless it is examined physically.