Agreed with other posters, but let me just say this about a possibility: You have these big blisters on your legs. and "skin problems where the elastic is". I don't think this is a typical MS symptom--not to say you don't have MS, but maybe you have something else too. How about looking at Porphyria (I have it, and discovered this through the old MS forum which preceded this one by many years). First try looking at a Safe/Unsafe drugs list for Porphyria, to see if you match. That's what I did. I've put this suggestion up here before, that others look at Porphyria, so sorry, gang, if I'm monotonous.
People with Porph have many of the same symptoms as MS, but some things more or less they divide on--in my experience with reading posts for many years, I'd say that most MS people do not have the strong ab pains (really ER level) of Porph, and most MS people do not have the skin blistering of Porph. And with Porph you are very likely to be depressed--"mental issues". Take a look. I'm sorry such suffering came your way.
Especially about the skin sensitivity at the elastic--how many years did I suffer with this before....take a look.