Okay Walking, I'll tell ya my secret weapon!! Giggle!! I don't have a tub either, and I don't have the money to put on in,as our bathroom is too small. What I did have however was a hard black plastic livestock watering tub!!! It's about
2 1/2 ft wide, by about
3 1/2 ft long. It fits into my shower stall and Hubby took a drill and cut out a drainage hole big enough to fit a standard bathtub plug into!
Wha-la!! One home-made bathtub!!
I have to admit I look something like one of those cowboys in a watering trough outside a saloon in an old Western movie, but it works!!
I am really sorry to hear what you are having to go through Walking! I have had and still get some pretty good stretches of those headaches. Fortunately mine have calmed down quite a bit now. Have you also tried heat at the base of your skull? or even a little ice? I know that sometimes muscle cramping or spasming would make a 'darn this hurts' headache into an 'OMG!!!!' headache, that's when the heat helps me the most.