Hygiene down there

I'm looking for some advice please. I was seeing someone (broke up with him yesterday) his hygiene hasn't been great recently & I've avoided doing anything sexual with him because of it but you know it was Valentine's and I felt I had to. Now my mouth and down there are sore, it's definitely not thrush as I've had that before and there's nothing white in my mouth. My question is I know he hasn't slept with anyone else so it can't be a std but is it possible that I could have caught something else because he wasn't clean? Please don't be unkind, I'm having a bad enough time as it is and am so embarrassed