When can I test ?

My period is late, but I don't wanna test to early for it to be a false negative just in case. There's are some of my symptoms

-itchy boobs /nipples they look a bit bigger.

-diarrhea.

- when I eat , after a while I can't eat it anymore and feel like throwing up.

-abdominal pain , and some slight cramps and a lot of white discharge.

- I can only seem to eat soup or cereal without wanting to vomit.

What does it sound like ladies ? I've seen some girls say there period is 2 weeks late and don't get a positive so I'm nervous.

What do you ladies think ?