I'm really hungry and really thirsty as well. You are only 6.5 weeks, I am 10 weeks tomorrow believe me the hunger and thirst will only get worse. lol
I am exactly the same! No MS but a little nausea and i have to eat all the time!!!!
I have gained just over 6lbs since i found out i was expecting and every night i say i am going to eat healthier the next day then it seems to be filled with carbs, yoghurts, apples boiled sweets and pretzels etc....