I've made a mistake

Hello people of r/gay I've run into a situation that I quite frankly don't know how to fix.Little backstory: I for the last about year or so have questioned my sexuality greatly. I'm 20 years old and have never been involved with either gender in any form of relationship. For the past year I've believed I was gay, I even told my brother and my parents who were all very accepting(I come from a VERY liberal family) and it was great.But theres a problem. I do not believe that I am gay. A part of me wants to believe that out of desperation I was willing to try anything just to get out of the loneliness that I've experienced. After a lot of time spent alone thinking I realized that my attraction to guys was non-existent and was really just myself trying to somehow put my sexuality on a path that I thought at the time was right.Currently at this time I have absolutely no desire to form an emotional/sexual relationship with a guy and am fairly sure that I'm straight. The problem being, as I stated earlier, I came out to my parents thinking I was gay. I don't really know how to tell them, this happening only a few days ago and was wondering if anyone could perhaps give me any advice as of to how to handle it?My parents have always stressed that what I do does not matter to them, as they will always love me no matter what, but I feel as if I may worry them on the basis of recanting my previous stated belief.Any help at all would be appreciated thanks!