Working out results... how soon?

I started working out this january. It is now the end of march. I started slower but now for the past 4 weeks I've been going to the gym 3 times a week- those days I do 40-45 min of cardiovascular work out- hitting my target heart rate, and then weight...

lifting- alternating between legs and arms, and doing back and stomach pretty much every time. On the days I'm not at the gym I run outside- now that it's spring. I run for about 20 minutes- probably 3-4km.
I eat very healthy. I am not a sweets or snacks person. I try to eat before and after I work out. I am aware of the amount of food intake... and in general have quite good control over my diet.
However I am not seeing any noticable results (I'm approx 120lbs, didnt have much muscle to begin with). I notice my endurance is better, and I'm able to increase the weights I use... but I dont notice a difference on my body.
How long should this take??? Am I doing something wrong??

well, it could take up to like, a few months. but to loose weight in your stomach, and upper body, and to start forming the muscle, you need to do cardio. thennn once you loose that weight, do abs and arms and legs.