Need help ASAP!

I haven’t kept anything down since Thursday night. Haven’t had any liquid or food since then either. If I go to eat or drink anything, It comes right back up. I’ve also had a headache too which is indicating to me I’m dehydrated. When’s the right time to just go to the ER? It’s just getting annoying because I’m worry about the baby and I’m hungry myself. I am 14 weeks and don’t want to put my baby at risk but also don’t want to just go to the ER for nothing.

Thank you sooo much in advance!