How soon can I test?

Sa

Yesterday was a weird day. ..

I craved coffee 😲 and had 2.5 cups (not all at once but a cup in the morning, one in the afternoon and just an hour or so ago had half cup). I am not a coffee person and have not drank it for years now.

Somehow have lost 1.5kg 🤨

I am also having cramps since last night

My pee is noticeably darker since yesterday

Also mild Nausea feeling at times ..

My last period was on 5th Sept and lasted 4 days.

How soon can I test???