Well, with severe dysmennroea possibilities that may need to be considered include infections, inflammations, hormonal/ endocrine imbalance, haematological issues etc. Possibilities other than gynaecological reasons for backache may need to be considered as well. It doesn’t make a difference if one uses pads or a cloth pantyliner, tough disposable pads are a bit more hygienic. Aside taking OTC NSAIDS there is little that I can suggest online. I would suggest consulting a primary care physician or a gynaecologist at your earliest convenience for an accurate diagnosis and appropriate management.
Hope this is helpful.
Finally saw a gyn & got a ultra sound (second one) this time they saw a large fibroid that is distorting the size of my uterus & a possible cyst. I have to go back.