Hello I am a 32 year old male. I have had sex with five different partners in the last month. I always use a condom except when oral sex is being performed. I went to the doctor and was tested for chlamydia and gonorhea, which both came back negative. My doctor gave me doxycycline to take. I have been taking for about 4 days now. However it seems that my symptoms are getting worse. It is extremely painful/burns when I urinate and I have an enlarged/swollen lymph node on the left side of my groin which is painful to the touch. I am getting very worried about what else this could be? What other diseases could have these symptoms?