Kind of gross just need advice 😊

My period is pretty regular occasionally I'll be a few days late but I'm four days late, usually I spot but haven't at all. AF was supposed to visit on the 19th but hasn't made her appearance yet. My discharge is sticky like so I'm not sure if it's just a missed period or what. I go on vacation this weekend so I'll probably start then that's always how it works hahha. Just need some advice please ❤️