Sounds like symptoms of low thyroid, tired low energy, fuzzy headed, lack of motivation even when you know there is something you need to do. To me it sounds like what you experienced was the return of your low thyroid as Ashwagandha is good for both high and low thyroid problems. I have dealt with low thyroid my whole life, my holistic Dr. said I have one of the worst cases he's ever seen. Anyway I can't say if low thyroid is your problem but it caught my attention when you said you started herbs because of being tired all the time. You should check out the Stop the Thyroid Madness web site. There is also a section about adrenal problems which you may have.
I can't post the link here but if you Google Stop The Thyroid Madness it will pop up.
Pounding heart is a sign of to much thyroid hormone and flip flops are a sign of to little thyroid. It is hard to tell the difference.
There are many things available for inflamation I like Braggs organic apple cider vinegar, which must be taken with at least 8 ounces of water.