horrible nausea and diarrhea

Apparently I'm about 11 weeks. I've been having horrible nausea and vomiting for the past month and half. 
Today I went from being slightly constipated the past week to having severe diarrhea all day today. 
I tried to eat and drink something to replenish but I'm not feeling really nauseated like I'm going to start vomiting again... 
Any tips??