Hello, should i be concerned that i feel so thirsty all the time, especially at night. also is 104/61 a normal bp for an 18 year old girl?

Humidifier. : Put a humidifier in your bedroom and see if it make s difference. To pay a visit to your trusted physician is always a good idea to do next. Best!

Maybe/yes: If you are getting up to pee as well as drink, this can be a problem.It can be habit, making your urine dilute which means you must drink more to keep up;it can be a sign of diabetes, but you would be eating a lot and losing weight; you could have a kidney concentrating defect. The BP is normal. You may want to schedule a visit with your doc to make sure this in not a worrisome problem.