Why are you taking antibiotics? Knowing how healthcare is these days my guess would be you have a light sneeze. Lol.
Antibiotics may kill the harmful bacteria, but they take out all the good flora and fauna too. Which comprises something like 80% of your immune system? Don't quote me on that. MDMA also negatively affects the immune system, so the risk of getting sick would be much higher.
Consider taking some probiotics. I take them daily anyway just to help digest food & general well-being.