You never experienced the feeling prior to the procedure?
It could be congestion but presumably you had venous congestion before and didn't feel it. It worries me too whenever someone has a new symptom like that, if it might be due to narrowing due to thrombosis or intimal hyperplasia or just simple restenosis, so I am glad you have an IR appt coming up. The whooshing sound might be pulsatile tinnitus which is the sound of the blood flow in the IJV going past the ear.
I haven't experienced what you describe but maybe someone else has?