Thanks to everyone who gave me advice. Since this car is a manual, I couldn’t ck the transaxle fluid so I took it to a car shop.The problem was a bad rear wheel bearing. Now the car runs well again.
Thanks for coming back & telling us what the problem was & yes a wheel bearing can get louder the faster you go .
Thanks for the feedback. It can help a lot of people with a similar (or exact) problem.
Good for you for getting your car back on the road in good running order. Wheel bearings sounds can sometimes be pretty difficult to diagnose, so your shop did a good job for you.