Im really vomiting a lot, should I go to the doctor?

So ... yesterday I felt a little weird. I had a fever, but I was shivery. No cough/cold symptoms though and I went to work as normal. Last night me and my daughter came home and ate dinner, and then she went to bed, and I started feeling really nauseous.

At about 10 o clock I started vomiting, and Its been going on ever since. All last night, (I live in Japan) around every hour I would wake up and vomit, and now there is nothing left in my stomach and its just yellow bile.

Also (Sorry, TMI) my poo is completely liquid, and this only started last night.

I have no stomach pain, but I am still vomiting, the last time was just a few minutes ago. What should I do? Go to the doctor or just wait and see if its a bug?

Also ... I work in Social welfare, should I go to work today? Would I be contagious?

I would really really appreciate your insights.