Hey, there. We still need a lot more info.
How tall are you? Also, please write down your workout (including cardio and running) in detail. I'm concerned about it, but I don't want to comment until I've seen more.
For now, I have to BEG you to trust me on something.
You simply need to eat. You need to eat every 3 hours until you are almost full. IF that doesn't start putting muscle on you (give it 2 weeks), then you need to eat every 3 hours until you ARE full. After 2 weeks of that, if it still doesn't work, then you need to eat every 3 hours until you are freaking STUFFED.
Here's something else: bluntly, you're wasting your money. That may sound harsh, yet I don't mean for it to be. My point, though, is that you are 18. Your damn testosterone levels are the highest they are going to be for the next 4-5 years of your life. If you lift intelligently and EAT, you will have mind-numbing gains, compared to the rest of your life. You don't NEED T3 Nitro right now...you need food (and lots of it).
Hmmmm....let's leave it at that for now and check your response.