I went through this during lockdown.
I think for me it was generalised anxiety. I was holding life together well, but for some reason driving was the pressure value. I went slower, I became sweaty and panicked. Almost panic attacks . I remember telling my husband about crazy junctions, being stuck in lane etc. I genuinely saw roads on top of each other in my panic, lanes were suddenly narrow and one road in the forest I was doing 30 on because of scary drops at the side.
Two years on I can see now the junctions are normal, half a mile apart joining traffic. Lanes are fine to pass in and the ‘drops’ are a metre or two! It’s so weird how I actually saw it.
For me the biggest thing was driving, rather than getting deeper and deeper in my restrictive patterns. I went out on the motorway at 6/7am Sunday when it was empty, drove a few junctions, handled the car a few times. It helped calm me loads. I made myself drive the routes I avoided. I’d been doing less and less in a vicious circle, and it got me back to normal.
Also, take your car for a service. My tyres were a bit too worn and a
small engine issue was slightly affecting handling. It was a little off at high speed (dh said it wasn’t and I listened 🙄). Now the wheels are balanced and the engine is working under load it’s handling beautifully. Obviously that makes high speed a lot easier!
Don’t worry this is it- I was a nightmare 2 years ago. Almost unable to drive and now I’m better than ever, totally comfortable using all lanes on the motorway and confidant/ aware.