My car is making a weird noise! HELP!

lkh5650

Hello guys, I am not sure if I post this here or on the other section. Sorry if I am posting in the wrong section.

My car is 2010 370z sports package manual (not touring or nismo).

I was driving home and I was for some reason not paying attention to my speed and I suddenly I noticed that I was going at 90mph and as I was about to step on a break i started hearing loud noise as if something is stuck between the wheel and inside the car (normally I go maximum 80 mph). It was so loud that I was worried something happened to my car and I was about to pull over and call a tow truck or something. But as I slowed down below 55 mph, the noise went away. So I decided to drive back home and during the ride, i noticed a few things.

The noise won't come up as long as I go below 62~3 mph
The noise comes out when I go above that and goes away when I slow down to ~55mph.

after I got home I checked between all 4 wheels and the bottom of the car, noting looked out of ordinarily visually.

What is wrong with my car? I am planning to take it to a dealership or a service center..

PS: last time i drove faster than 80mph was probably about a year ago. I got oil change recently @41000 miles (replaced filter too). I am around 41500~42000. All of the driving was done on 6th gear, I didn't test if my car would make the same noise on 5th gear at above that speed.

thank you so much for your help.. I am panicking T_T