tmi! infection in my vagina?

mary
Hi ladies, this will be tmi so i appologise in advance!
Over the weekend i had quite watery discharge and i was at work and unable to change and when i got home i had red marks on my groin. The day after it started to sting when i peed really bad, so i started applying sudocreme, thinking it was just from rubbing on wet clothing. Then i started to get pus filled spots on my lips and mouth, and a swollen throat. Didn't think nothing of it.
But over the past couple days the stinging has got so bad im crying when i pee and i have pus filled spots all over the outside of my vagina and towards the bum. I have been with my partner over a year and never experience this before. Does anyone have any advice please?