Congratulations !
but IMHO = simply too good to be true ...
take a shot of a sky at ISO 100 F at least 16
( wide angle lenses are best for this test )
Dust spots get visible .
Once I had to rent a canon M1 Ds Mark 2 =
I have never seen more dusty chip ..
Upon returning to the rental company , they told me that
there were completely no complaints before me ..
LOL - naturally this is a relative situation , if you shoot sports mostly at F 5.6 ,
you will probably not see anything ...
If you change lenses several times a day - my guess is that you have spots .
I have been using D60, 1 DS mark 1, 1DS Mark 2, 350D, 400D
I have 2 5Ds, one 1 Ds Mark 3 , and one Hassy + Phase P45 ..
All of them get spots with time - sometimes if I'm very savvy with lens changes it can take several months ...
Right now my 400 D " pocket " camera is least dusty ...