Dehydrated

So yesterday I ended up in the E.R. for dehydration. Didn't know I was dehydrated just was very lightheaded. Went to bead lightheaded, woke up lightheaded thought hmm maybe after I eat I'll feel better. Nope nearly passed out called Dr and they informed me to go to hospital maternity section to be monitored. Well because I'm only 9 weeks along they couldn't so they sent me to the E.R. Turns out I was dehydrated. 5 hours and 2 iv bags later I was released. So point of my story I guess is everyone make sure you are drinking plenty of water throughout the day especially if you live in a hot area. I thought I was getting plenty fluids but I was wrong.