P-Plex and M-Drol are oral steroids. That's why they are harsh on your liver (and your entire body for that matter). You shouldn't be considering them.
Now I know this is probably the last thing you want to hear, but you don't need any supplement stacks or any crap like that right now. All you need is LOTS of food, some whey protein, and creatine if you'd like. You can't expect to have the body of your dreams by March, but you can certainly pack on some mass by then.