TR1GGERx1

hey guys. im really pissed off rite now. i was just getting into the car and drove around doing some errands. it was running fine for about 15 min or so. then i went on the freeway noticing a lil "clunking" noise. so i thought maybe it was my "bald" tires. so i got off the freeway to see if there was any wire sticking out or wut not. it seemed okay. so i decided to keep on driving when i realized in traffic, in ** 2nd, 3nd and 4th gear ** got REALLY bad and making even a LOUDER clunking noise. so i knew then it was my gear or tranny most likely. so i was just trying to cruise it back home and had to put it in 5th going 20mph cause in 5th it seemed to be arite. even in netrual it sounded bad. im not sure if anyone has experienced this. but im probably going to tow my car into mazda tomorrow and get this checked. does anyone have a tip or idea why this might have happend? i'll keep u guys updated from wut mazda tells me as well

-Sam