In my opinion everything is okay and normal, the grafts will almost all be gone in 4-6 weeks, you will see them when your washing your hair, you may even look slightly worse than when you started. Shock loss can last up to 3 months, but hopefully your hair will grow back, as is the case with most.
Being paranoid is all normal, you will question the surgery, keep looking on the mirror, feel anxious etc. just hang in there and remember nothing will change for 3 months, after that you will see the growth. You will know if you have lost a graft if you noticed blood, so don't worry.
The opinions are my own I'm not qualified, just a bloke 3:5 months post his FUT op.
Bucks