Dehydration

I’ve been feeling really dizzy lately with headaches and been vomiting occasionally 3-4x a day on and off, sometimes once but can be a lot.

The doctors said I am dehydrated after doing a urine check and said I need to keep my fluids up. I drink plenty of water in the day and Urinate often.

She said if it doesn’t get better I’ll have to be put on a drip

What can I do to stay hydrated because this headache is really getting to me now?