Hello GP,
I'm so sorry that you have had to join our ranks. But, since this thing has happened, you have found yourself in a very good place for support.
I agree with everyone else about the driving. Rather than driving aimlessly, perhaps find a park to pull over at, or somewhere safe in your car where you can have a good cry, but not be driving while doing it.
For me, I also cried a lot in the car. The shower was another place where I felt that I could have a good cry. If you do not have a speaker, you can get one, either a water proof one or just one to keep in the bathroom and turn it on and have that good cry in the shower, with the warm water cleansing those tears.
If you have not yet read "Survival Instructions for Newbies" you should do so immediately. You will find the link in my signature.
Continue posting here, on your thread. It's a great place to get much support from many people, mentors and members alike. There are so many of us all from different places around the world that will reach out, any time of day or night.
You are always welcome to private message me, but just know that you will get lots of great support when you continue to post here. We've got some great supporters in this forum, and you will be buoyed by their caring and concern.
Another great resource is affairrecovery.com - I am not on there much any more, but I still subscribe to their emails and it's such a wealth of great information. They also have a great youtube channel. You can find that link on my signature where I've linked "The Apology Every LBS Deserves". If I could every get through that video without crying, then perhaps I will know that full healing has happened.