Do i have an infection?

a few weeks ago i got treated for thrush and since last thursday i’ve had an awful rash around my vagina and it’s been extremely itchy and painfully dry this weird grey ish discharge is coming. I’ve been tested before for STDs and luckily i have none but from what i’ve read these are symptoms of a STD. i havent had sex since i got tested so i feel like it’s unlikely to be that. i had a feeling it’s bacterial vaginosis so i put this cream thing for it but i’ve seen no changes. Has anyone experienced anything like this and should i make a doctors appointment for ASAP? i need all the help possible.