I'm a bodybuilder, i took a creatine and testosterone pills, immediately after taking them i had difficulties to breath and it's been 4 days now, i went to see a gp and he told me it was gonna flush out and i'll get better but it's not getting better?

Doesn't sound good: Dr. or ER can check. Most supplements are not studied enough by researchers because the supplements are not FDA-approved drugs for treating particular disorders. Nobody knows for sure what happens if a person takes performance-enhancing supplements. So, it is best for all athletes to train and build their bodies the natural way, with healthy nutritious foods, avoiding "supplements" and steroids.