Feeling horrible .

I’m 30 weeks & had a cup of coffee today (off of the wake up) I have other children so I thought I’d drink that & be energized for my birthday today, well that turned out wrong. I wasn’t hungry before I drank the coffee so I drank it on an empty stomach & fast too (idk what I was thinking) fast forward to to now it’s 8pm I’ve slept my birthday away, been throwing up and feeling dizzy. I haven’t even had the energy to stay awake today, I feel horrible. Has anyone else experienced this? And what did you do?