Myobi device tips

I recently bought the myobi Apollo 2.0 and was wondering if anyone had some tips for using it.

I have deep endo, adeno and I think my recent sciatic pain is related to the endo - I have constant abdominal pain, regardless of where I am in my cycle and terrible back pain during ovulation.

I used to use Tens therapy for my shin splits during college xc but feel more nervous using it on my abdomen for some reason.

Any favorite settings of all the different modes? And do you go past the recommended 30 minute limit? Also how many times in a day do you use it?

Thank you!