Herx or something else?

I'm just about two weeks into my doxy. After about three days I think I may have started herxing. I don't know for sure because my symptoms have always fluctuated hourly/daily. But, I think my back pain and left arm pain has increased somewhat. But, if I'm herxing, it will be 11 days straight...isn't that a long time?

Chills/cold flashes and hot flashes have been plaguing me since the start of my lyme symptoms. But they've not been my worst symptom.
However, the past two nights - they have been almost unbearable. I'm getting woken up all night long with the chills and then hotflash - alternating.

Could they be part of the herxing? Do the adrenal glands get involved with herxing, too?

I'm thinking of backing off on my doxy dosage for a few days and see if they subside...then I'll know.
I am on 200 mg twice daily, and ramped to that dose in three days.

Thanks everyone! It seems to be one crisis after another with me...or is it just one big crisis - called Lyme disease? lol

When I first started having symptoms - back in October, I had a 24 hour urine collection test to check levels of cortisol and a couple other things related to adrenal function.
My cortisol levels were high. I was very stressed at the time. I did a low dose cortisone challenge - where I took a very small dose of cortisone and the next morning had my cortisol levels checked again. They were back to normal. I was told then that my pituitary and adrenals were fine.
My Dr. ordered a CT scan of my adrenals - came back clear.

A couple months later, i wanted to check again - and did another 24 hour urine cortisol test, and they were in the normal range.
I was still concerned and paid for an MRI - to check for two things - plaque (MS) and a tumor on my pituitary gland. The MRI was clear.

I am in menopause phase of life...but what I've experienced the past couple of nights if over the top.
Also, I have never had an issue with hormones - in my - life - no PMS, no Post partum, so I seriously doubt that it's all because of menopause.

I also had my estrogen/progesterone/testosterone levels checked a few times - twice - by saliva method, twice by blood test. My estrogen was low initially, so reluctantly went on "bioidentical" hormones, but didn't feel any better after 6 weeks or so and when my levels were checked again, my estrogen had risen right out of menopause levels even though i was on a very low dose. So, I then decided to do the progesterone cream as I believe i never needed estrogen...as my progesterone was even lower...so I was estrogen dominant.
My gut feeling is that it isn't my "female" hormones doing this...but we can't go by gut feelings...