Anxiety Support Group
Anxiety is a physical condition marked by intense and persistent feelings of distress, fear, angst or dread. General anxiety caused by routine day-to-day stresses usually passes quickly and is experienced by almost everyone at one time or another. However, such feelings that linger over time and are very difficult to cope with, and which lack a clear cause, may indicate...

There are lots of grounding strategies you can Google but only you will know what works for you. Keep trying until you find some that work.
Mindfulness/focus exercises combined with meditative breathing can work while pulled over but you should practice at home first.
Music helps, having a soft cloth next to my hand helps, positive thoughts to get "in the moment" helps, and it's improving the more I do it.
Best wishes.