and still lose fat?

I have been working out for 2 months now "trying" to do Atkins. My mood and energy level have been unstable. I don't think I have carbs at the right time. My schedule is this:

Sunday-Weights-one hour at the gym doing abs, arms, legs alternately on the machines Monday-45-60 min. spin class (Very intense)
Tues-weights
Wed-spin
Thurs weights
Friday-day off
Sat. spin

Sometimes my schedule changes a bit due to my kids and other obligations. Sometimes I only get 2 days of weights in (always thought cardio was better at burning fat)

I weigh about 135 and I haven't lost anything in 2 months (gained muscle?) My clothes fit better so I know am losing fat.

When exactly do eat carbs? What kind are best? How much and how far before a workout? I try to eat 30 or less total carbs but I have been sneaking in low carb tortillas. Sometime I am so sluggish durning a workout and I feel horrible. How can I time this all to feel great, have energy, and burn the most fat? Or is there a book I should read to help? Thanks so much for your help! Since working out I have been so confused on my carb intake!