Can my uality change over a week's time?

I thought i was straight every day of my life, i started to doubt it because of experimentations of how things felt since i never had a gf at the age (basicaly i just wanted to know how certain ual activities felt), begining of teen years (INO THAT DOESNT MAKE ME ). Even as I started to worry about those past things i did, i told myself that I could never have feelings for a guy. Now i slept on it and im starting to doubt that too even though i havent been or wanted something from a guy in an emotional manner. Even tho go back to a few days from now and it would have been a honest no. Can my uality change over such a short period of time.