almost there

Ok I'm a bit confused 😐. I started my fertile window today and I woke up exstremly nauseous. Didn't vomit but wanted to, and as well as my fiancé. He did vomit. We had sex last night and the night before, twice if that helps any. I have started using opk for the first time about 3 days ok just need help with knowing if it's positive or not. The first one is day before. And the next too was yesterday , and last is from today. This morning around 9ish