Why is my hair still very thin after five and half months of hair transplant?

You will lose your transplanted hair as well as some of your native hair weeks after surgery.  You may look worse before it starts to look better. It may take 6 to 12 months to see the results of a hair transplant surgery.  It is always a good idea to follow up with your doctor for a recheck if you have concerns.

Your transplanted follicles will take up to a year to start growing.  Please don't be concerned with your density now.  Assuming you had enough grafts to make a difference, you will see better results with time.

I generally don't evaluate the end result before six months because I have seen patients who start showing their full density after months 6 to 8 at times.   I cannot make a comment about the gaps and what density you should expect.  It all has to do with the technique and dense packing that you received.