Air carrier Flight Attendant reported an electrical burning odor in the cockpit and forward cabin that was corroborated by the Captain. The Captain completed a diversion and landing.

Narrative

At cruising altitude about 30 minutes in the flight. Captain asked what we are burning. Lead Flight Attendant responded we were not cooking anything. There was an electrical burning smell in the cockpit and forward cabin. They both searched for the source of the smell. When they couldn't find it FA3 (Flight Attendant) searched. FA3 couldn't locate it. I searched and couldn't locate it. When I stepped back in the forward galley I heard a whining sound and then heard something shut down. Then the Captain said take your seats I am declaring a [priority] landing. We prepared for landing. We did land safely without out incident. We did not evacuate. We pulled to the gate safely. Unfortunately the airport was not equipped for our aircraft. So we deplaned by baggage belt. That was scary as well. Once off the plane and inside the airport and adrenaline was gone. I was not okay mentally to continue on with the rest of my trip. I was pulled from my trip and put in a hotel to go home the next day. The crew was informed that we had to take the plane back. Because maintenance MEL the issue. I was not okay with that. But when I called to ask crew service if I could get a car home. Instead of the plane because I didn't feel comfortable until it was completely fix. They said I can deviate from what is on my schedule but. I would have to find my on way home and follow the proper company procedure. After speaking to the Captain about my concerns. He stated that he would not take this plane it he was not comfortable. I was not okay with that. But if I didn't want to be stuck in ZZZ; another night I had no other choice but to ride on the plane I was not comfortable with. We did make it back without incident the next day. When we as crew go through an [unexpected issue] we should not be expected to continue on. We should be pulled from the trip. And make sure we are okay physically and mentally. We should not be in fear of losing our jobs and or being reprimanded for not wanting to continue on from a [priority] event.