Is it worth a trip to the doctor for blurry vision and eye pain?

Yes: Anything that is not normal needs to be evaluated. You shouldn't have eye pain and blurry vision.

Usually: If the blur is of acute onset, you shout see an ophthalmologist as soon as possible - especially if accompanied by pain or redness. If the blur is of slow onset over many months, then you probably need eyeglasses or an improvement in your eyeglasses. During this exam for eyeglasses you can be tested for other sources of blur like elevated eye pressure or diabetes.

Yes indeed.: See an opthalmologist who you are familiar with or ask your friends that they recommend.