All the thrush symptom but the vaginal opening is torn and worn. Could I of done it myself...

Ouch. It's a fungal infection, and it loves uncleanliness. This may not be the case for you, I'm aware Hun. I've found that if you just wear sanitary towels for too long without changing them, it can, well, I'm not going into detail, but it isn't pleasant. (Yes, I learned the hard way)

It's a yeast infection, and can sometimes be passed through sex, too. Have you visited your doctor and gotten a prescription and some cream?

X Dani