I'm sorry you're going through this. I had a lot of issues when I was a mom of a young child too. I have a friend who was in a car accident that resulted in major whiplash and headaches, and she spent a lot of time on the couch. She always felt that she could have been a better mom. If we had known then what we know now, we'd make different choices. But I do believe that taking care of YOU is the first step to being a better mom.
If you don't feel the PA was responsive, it may not be because of the PA training - it may be that the person is just not your cup of tea. Some "real doctors" aren't either - so be sure you have a practitioner who is listening to you and open to a variety of things.
I checked on Thrive for about 5-10 minutes, and learned that the parent company, Le-Vel, is not Better Business Bureau accredited and I note that the website shows nothing about clinical studies on the products or the ingredients. There are a few celebrity spokespeople but I don't think that means much in this world. Alex Trebek advertises for life insurance and Henry Winkler hawks reverse mortgages, but I'm not using those companies just because a well-known entertainer got paid to endorse them.
I work in nutritional education and I am heavily science based - I'd want to see clinical data, and I'd want to know where the products are manufactured and under what conditions. Do they have the FDA Good Manufacturing Practices designation? Is the company well rated by some independent organization, such as the BBB or the Direct Selling Association? Do their food scientists actually formulate the products, or are they just a sales outlet for something made elsewhere.
If you are noticing some benefit, it could be a placebo effect or it could be that you are nutritionally deprived (most people are - you cannot get enough from your diet no matter how well you eat - so says the American Medical Association). But unless those vitamins and minerals are balanced and absorbable, you're not getting your money's worth. Are you getting nutritional support from your friend and does she have any training? And if you are basing your nutrition on caffeine, I'd be highly skeptical. There are far better choices.
ETA: Sadie H., "pyramid schemes" are illegal. Lots of companies charge too much for their junky products - WalMart is one of them, and maybe Thrive is too. WalMart stores aren't manufacturers, they are distributors of someone else's products. I don't know where Thrive gets its products but since it doesn't advertise that they create them themselves with their own scientists and under FDA scrutiny, I'm assuming they are just distributors. That's not, by definition, a pyramid. But I'd like to know a lot more about what they sell before I'd buy it - and they aren't emphasizing that, so I think it's safe to assume it's not as reputable as we would like. But there are plenty of good companies that sell through individual distributors (Tupperware, Mary Kay…) and they are not pyramids just because you sign up through someone else. Companies need to be evaluated through independent means, and that's easy to do.