Its still a early to be judging density at month 7, the hair will thicken out over the next few months and will not stop till about month 18. It may be you are just a slow grower.
what were your stats out of interest, if you have normal thickness hair (c. 50-60 microns ) you need 100 hairs per sq cm in bald head to give the appearance of coverage, if you have think hair you need more, if you have thick hair clearly less.
1. Hair thickness in microns.
2. Hair to graft ratio average
3. Size of area transplanted and number of grafts transplanted
4. Are you on Propecia or similar?
5. Post all your asmed photos and stats so we can see what was done and where
To me you do not look that bad and perhaps 3000 hairs would give you a very good result assuming you have relatively thick hair and over 2.1 hairs per graft. But hard to judge withou the above information.
There is still another 3-4 months before you will have any idea of your final result. Particularly in relation to density.