sounds like you have thrush which can treated easily from your chemist shop with a tablet, cream or pessary probably from over washing away necessary bacteria. do not have unprotected sex. i also had lots of problems down below with soaps washing powder etc etc i now always use the same washing powder that i have found doesn't irritate and use a baby wash. always rinse well after you wash and avoid hot baths. if it doesn't clear up seek medical advice. but don't worry everything can be treated
you may have allergies to the soap-my sister has to use unsented and cant have any types of relaxing bath beads or fizzers. you might have had a bad reaction, also if you used a rubber during sex that can also be a proublem, but with the bumps it could be an std, i would really go to a doctor and find out a.s.a.p if you dont you could end up doing alot more damage to your health and reproductive organs....hope this helps...
Did you have the sexual incounter before the incident with the bath beads or visaversa?
You need medical attention asap to get this sorted out.
In my opinion sounds like a terrible allergic reaction or possibly some type of STI.
go to your clinic to have tests done,and in the meantime avoid unprotected sex or even sex at all until this is sorted.