Water makes me sick

Im currently 7 weeks & it’s like every time I drink water it gives me a massive headache and i know i’m pose to drink about 5 bottles a day but once I hit bottle number 2 i just can’t . I tried adding fruit that doesn’t work i still get headaches it’s just the water! What else can i drink to replace water?😩

I went a whole day without drinking water and had no headache idk what the problem is at this point