Two weeks is nothing - it took me a month before I got my first lucid dream. To me it sounds like you're being really impatient with this - expecting immediate results, especially with the use of supplements. Recall and lucidity are something which come over time with continued effort and dedication. Working on your recall is the first thing you should be doing - how will you know if you had a lucid or not if you can't remember your dreams?

Keep using your dream journal and keep doing your reality checks. With reality checks it's quality over quantity - doing 50 reality checks is no good if you're just skipping over them quickly. Stop what you're doing, look around you. When you do your reality checks REALLY question reality. How are you sure that you aren't dreaming? Do different types of reality checks to try and be sure.

It's all about effort and patience really, i think you just need to give it more time