Of course you feel it's something terrible, you have HA.
Anyway, going to ultrasound won't help you in the long run,as you will jump to another illness, so I am going to give you long term advice.
-Stop Googling completely.
-Start working out if you are not doing that 3 times a week for 30 minutes.
-Reduce checking symptoms to one time, once a week only.
This should reduce your anxiety significantly.
If you can't do that, talk with therapist to get some meds and then start applying those 3 things I mentioned previously.