Taste

I have always heard comments of people saying what type of water brand they prefer because they like the taste and I have always said that I find them all the same they all taste the same for me. Well two nights ago I woke up so thirsty and had two different water bottles and I finished one and it was so good and I was still thirsty and drank the other one and for the first time I tasted the different and I didn’t like it. Could it be the change of pregnancy taste? I don’t want to get my hopes up I’m 7 days away from getting my period.