New noise after having to drop the gas tank to drain out diesel fuel that was accidentally added

I just had to drop the gas tank on it because my stupid butt went and accidentally but diesel in it so for it to run again that had to be drained out of it. Besides replacing the file filter, that's all I did to it and it's running again now. However, now I'm hearing and feeling this new sound that's coming from underneath the car when I'm driving. Now I haven't driven it far at all cause of this, don't want to mess up anything so have only gone a few blocks then parked it back at home. I don't know what it is, but it seems to be coming from the front end of the car and like from the center underneath area, and kind of seems like a possible rubbing of something. Any idea what it could be and how to fix it?