Advice!! 😩

Okay you guys, I've been sick as a dog for like a week now. I will start to feel like I'm going to throw up but when I go to do it, nothing comes out. My period hasn't came on, I haven't seen so much as one drop of blood. My body feels so stiff and sore today. Should I test? I have two apps and one said AF was supposed to come on 9/11 and Glow said 9/20. Either way, I missed both dates. Whatdoya think? Lol