Jesus. 11 lean lbs is great...but still doable naturally for someone who's never lifted. With that said, unless you're working with a trainer or someone very experienced it would be difficult to make those kind of gains that quickly.
Personally I never felt THAT much different on test outside of the weight room. I thought the same thing on my first cycle - "I don't feel that much different, this isn't working" - but the results in the gym and the mirror don't lie.
Different story in the weight room...when I'm on cycle I unintentionally slap bitches in the face with my big swinging dick. But otherwise it's not a massive life-altering experience. For me I've never felt more than a slight elevation in mood, energy, and sex drive. But I have decemt natural levels so the difference may be more dramatic for others.
Basically just because you didn't FEEL that much different doesn't mean it was bunk test.
Did your balls shrink?
When you get your bloodwork, post it up here like fitguy said. Your LH, FSH, Test will tell us a lot. Careful getting it done @ a hospital or docs office, it can get pretty expensive. Privatemdlabs is a great value.