Ok So It All Started Three Days Ago Straining For

Ok so it all started three days ago straining for a bowel movement after that I realize the area between my anal and vagina was swollen and hurt really bad, making it hard to sit and stand up. Also around this time I switched soaps so then I realize my vagina was sore with that so it itch and of course I would scratch it so now I have lil cuts and bumps on my vagina that hurt and make it burn when I pee.. What could cause this and how to cure this quick going on a week of pain and slow walking and movements helppp