I was also going to mention Buscopan. I have nasty periods which are getting worse (I have a gynaecologist appointment...for December!) and get severe abdominal pain from crotch to diaphragm. Buscopan works on smooth muscle tissue and means that I can actually stand up straight or lie down flat during those times. It doesn't work on other kinds of pain, though.

Lots of people take amitriptyline for pain management especially when nerve pain is involved, at low doses (10-25mg at night) including people on SSRIs and SSNIs, so that might be worth checking out if it's safe.

Ice is really good for my psoriatic arthritis (which flares up in winter, so that sucks!) but not for other kinds of pain; heat is good for other pains but not my arthritis.