never2L8

Get your body fat percentage checked in case you still have a wall of fat between your skin and abs. Being 136lb at 5'9" that may not be the case but get it checked anyway. Below about 10% body fat is supposed to be where you have to get for your abs to show - so the theory goes.

If your BF% is low, the problem may be that you are doing too much cardio. Your body needs energy when doing cardio, if you do too much cardio or eat too few carbs, it will start using protein for fuel. Your muscles need that protein to grow and get stronger, if it isn't present because your body has used it up as fuel, your muscles won't grow.

At your weight, I'd say you should be doing less cardio. You are only jogging for aerobic fitness - not fat loss - so don't need to do 45 mins a day every day. Jog for 30 to 45 minutes every second day, preferably on non weight lifting days. If you do cardio on lifting days, do one in the morning and the other in the evening.