depends on the state in which you operate and also the freight. CA no rack needed, AZ rack required unless hauling shippping containers or large crated items. diferrent laws for each state, that's why all over the road trucks have them on but some local or short haul trucks do not. Most likely a ...
As long as you are conscious and not feeling like you will faint,I wouldn't worry about it, otherwise see a physician.
The first thing that i would do is to check your starter. I might have wobbled just right an it not catchin correctly. Hit it with a hammer a couple times. If that doesn't work, make sure to check you rbattery connections. If your battery is fine then bypass the cylinoid and see if it turns over.
maybe catalytic coverter clogged, leaking coolant hoses to/from heater core, hopefully this helps.
i know my husband was 5 months old and hit the dash. he had major head surgery for his illness.has his wife i see things you dont normally see.its like he has adhd.it is hard on a relationships and maybe you two need to talk. maybe that will help.