To whom this may concern, I smoked weed yesterday and had a couple of alcohol. Today, the lymph node on my neck started hurting. It is not swollen though. I also got tested for UTI and other STDs about a month ago and I had gotten chlamydia from my girlfriend but I was tested negative for other STDs including hiv, which I get tested for every 3 months. After I took the medication for the chlamydua, after like 2 weeks, I started developing this type of small rashes, they dont hurt or iche. And I would sweat often on my back alone, could it be a side affect for the medication?