sorry to hear what you're dealing with
all i can offer personally, other than a sympathetic ear, is nutrition advice. but action costs money. the only thing i can thing of suggesting that would have approx the same price tag would be to rejig the family diet so that the things that are bought for everyone are not things that will set off your various signs and symptoms. i'm here on the ms forum, but i have a track record for keeping people with bipolar in good shape too.
anyway the basic idea is, boost omega 3 foods and reduce omega 6 to help fight inflammation, dump processed foods/drinks and choose whole foods, boost nutrient dense foods, including those containing healthy fats (eg flaxseed, salmon) and boost food sources of zinc and magnesium. eat lots of nuts and seeds, but again, balance the fatty acids. i can help you figure it all out. make sure you consume things that are fortified with vitamin d3. it's important to have lots of zinc and magnesium to help with the d3 absorption.
another way to help boost zinc is to apply penaten cream (18% zinc oxide - yes the stuff for diaper rash) to your skin. it'll absorb in and help your levels. also, to boost magnesium try epsom salts baths. the salts are magnesium sulfate. magnesium is great against pain and fatigue. also, with zinc and magnesium helping you absorb d3, that can be useful for pain too.
if you can save up for, or get some help to buy an extra strength high quality multivitamin, that would be a highly useful addition too.
hope there's something in there you can use!