New Low Pitched Tinnitus Sound from Sitting in Idling Car

I tried starting my car and sitting in it for under a minute the other day. Then the next day the normal 6 kHz tinnitus spiked and hasn't come down.

But also now there is a new sound that I thought was real. I kept going outside to see if it was an airplane or party in the distance. It's a low fluctuating hum that's very disturbing.

Would anyone know the cause of this?

 

No idea of the cause but I have it too.

I screwed up my ears with in-ear headphones, both hum and high pitch eeee are a consequence of that mistake.