Swollen going nodes, ulcers but negative std test. What could it be ?

i have been in the same relationship 2 years and both got tested before being sexually active. both tested negative. 2 years later (last week) i get burning pee, swollen groin nodes and 2 yellow flat ulcer spots. the ulcers cleared up over 5 days but then now i notice skin colored pimples around the area the ulcers were. i visited GP and he says not sure since i was tested negative but im still worried. never experienced burning pee or ulcers before. anyone have similar or any ideas?

could have been a nasty bacterial infection. where are these ulcers and pimples located?

Hey. Get tested again for STDs. Get it out of the way and just get tested.

i have results coming in this week.

turns out negative results.