Late period

Maritza

So I’m 3 days late I’m hoping AF doesn’t come but I don’t wanna get my hopes up neither 😩, my boobs hurt and I been having white watery mucus coming out through the entire day and been having light cramps idk if it’s because I could be pregnant??? I took a test yesterday a cheap one from the 99 cent store but it came back negative I believe, I’m so confused!! Help anyone ??!!