Washing Machine super loud noise at the start
It sounds like the pump stalling because it has a sock stuck in it.
IF you feel competent to look up 'how to remove back from xyz appliance' and do it, you can.
The worst that happens is water on the floor and you started the job for the tech.
Remember to unplug before you start.
If you're not mechanically able then don't use it and wait for the tech.
Loud noises mean something is hitting/impinging where it shouldn't.
This is 'homeowner experience' not 'repair tech knowledge,' FWIW