Magnesium orotate has been very helpful for me to calm my muscle twitching.
I get random pains/cramps, in my intestines and the pelvic floor, and when I'm herxing.
As Girlie said, with it increasing after the start of treatment, that would mean that you are starting to herx. You need to either start or increase the amount of detoxing you are doing so that the herx doesn't get worse..
You can find a great article on detox methods here:
www.tiredoflyme.com/detox-methods.html You will also need to be using a good probiotic - take 2 hours after your abx. Any closer to the time you take your abx, and the probiotic will do no good.