I'm terribly sorry that you had this dreadful experience.
Yes, it sounds as if the police were out of line. You also might want to accept some responsibility for being pulled over, in the first place. Making a sudden u-turn is (sadly) "reasonable cause" for a law enforcement official to make a traffic stop. I'm not suggesting that it's "RIGHT," or that you somehow "deserved" the experience, by ANY stretch of the imagination. What I'm typing here is that remaining calm and balanced can help avoid such situations.
Now, about the physical issues: has anyone alerted you to the body odor prior to this episode with the police? This is really not uncommon and can be managed by making changes. But, those changes are going to have to go one-step-at-a-time in order for you to include and exclude what seems to work. There is NO one-and-done approach to managing pervasive body odor - there isn't. Just like any other physical/medical issue, it is a lifelong journey of management. People with candida struggle on a minute-by-minute basis, and some are quite successful. But, there's no way that all techniques and approaches can be accomplished in one fell swoop.
First, visit a medical doctor - yes, yes, I know that this site is generally apathetic towards allopathic approaches and I thoroughly agree, in most cases. But, there may be a hormonal issue, here, or there could be some defficiency, or a recognized condition. Having typed that, unless it's a syndrome condition that is life-threatening, you are not obligated to take the allopathic path. In fact, if you are armed with the proper information, you can explore countless options for yourself.
Second, try to understand that God (or, any other Higher Power) hasn't dealt you a bad hand, here. There isn't some malicious diety sitting in some astral throne picking and choosing people to inflict harm upon. What we experience is what we experience, all religions aside. So, accepting that it's something that simply happened might help you to maintain whatever spiritual approaches you have.
Third, this may sound/read as some claptrap, but begin working on self-confidence. By that, I mean making your mantra as, "I'm okay, and okay is good enough." Form positive affirmations and develop a daily ritual to instill those affirmations and calm your mind. You are priceless in this Universe - there is not another you, and you cannot be replaced. This is a fact, not a compliment or flattery. So, with that in mind, building confidence and understanding that "you're okay" is going to help you to set aside fear (making a sudden u-turn) and give you a true balance.
Finally, consider expressing your feelings and experiences (all of them) by journaling or, on this site, by blogging. Getting the feelings, perceptions, and experiences OUT of your self is a huge help. I suggest writing them down using pencil/pen and paper simply because that act physicall, emotionally, and spiritually connects us to what we are doing. Working it through technology doesn't allow that whole-self experience.
Brightest blessings to you on your journey of recovery and healing. You are precious in this vast Universe. Know it. Breathe it in. And, look at some photo images from the Hubble Telescope to help you understand how important you are in this world. :-)