Open Question: Do I need to go to the ER?

Ok, so this question is a bit GRAPHIC so beware.... I ate some sushi yesterday and by the evening I had SLIGHT diarrhhea and so then it went away it seemed. I went to bed and woke up at 3 am with a headache and light fever. I just figured it was slight food poisoning. I went back to bed and woke up at 1 in the afternoon. I had a little more diarrhea and felt weak and had a headache so I went