cancer survivor new to magnets, am I doing this right?

I can't afford to buy one of those Ladycare magnets for perimenopause (going through a LOT of symptoms), so I found a rare earth magnet that's 3,000 GUs (the ladycare is 2,700) and I'm planning to tape it to my skin in the same spot the Ladycare directions say, with the negative charge against the skin. The Ladycare is supposed to clip onto your underwear, to aim deeply into your pelvis. So I guess I could tape it to the outside of my underwear for greater comfort.

I'm a Breast Cancer survivor so I'm nervous about doing something wrong. Does this sound ok? Thanks!

edit: I'm confused about the electrical charge (+/-) and whether this is the same as North vs South facing. Is the south facing also the negatively charged? Tweet