Vag burns after sex

I used a summers <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a> douche and after that every time i have sex it burns and hurts really bad when i go pee. I know i don’t have stds i been checked. I don’t think it’s a uti I’ve had those before and this is a different type of pain. It’s only when i got pee after sex for a couple hours then it goes away. I don’t have insurance or money for a doctor. So any suggestions would help. I’m thinking something in the douche affected me because it stung when i used it.