I was in hospital for 4 days with DD1 & 2 trips with DD2 one for 4 days one for 6. On a drip all 3 times due to severe m/s. I don't remember doing a urine test to pick it up though.
I never heard of any medication to help with the dehydration, just to try to help with the morning sickness.
You could've been given Folate. It's supposed to be taken 12 weeks before & after concieving to help make sure there are no spinal problems.
Gastrolyte is good for helping with dehydration. You get it from the chemist.