^^^Yes, he is correct on both account that it's still going on and you do have to choose three different items. Keep in mind that we still have Orange Triad + Greens as well so that along with the...
Would definitely go with citrulline instead as l-arginine is outdated and no one really uses it in their products anymore. Also, if you're looking for pumps you can check out products with nitrates...
I would opt for you to use a fatburner when you have plateaued out in your diet/training alone but if you want some recommendations then I would not recommend anything with y-hombine in it if you...
It's really hard to narrow it down unless there's a common ingredient (aside from caffeine, which probably contributes to your issue) in all 4 preworkouts that you have used that is causing it.
You should wait until you stall out before taking any supplements like a weight gainer. Just eat a bit more and be consistent with your workout and since you're just starting you'll be getting newbie...
Some test boosters on the market does work to a degree but even then it's only for the duration that you're taking it so you'll have to be constantly on it.